The file /root/traccar-geocoder/builder/tools/geocoder_patch.cpp has been updated successfully.

#include <cstdint>
#include <cstdlib>
#include <cstring>
#include <ctime>
#include <fcntl.h>
#include <malloc.h>

// geocoder-patch v3: Apply custom patch format.
//
// Decompresses zstd transport layer, then:
// 1. Reads string remap, applies to old data files
// 2. Replays merge sequences to reconstruct new data files
// 3. Writes full-replacement entry/cell files
//
// Usage: geocoder-patch <current-dir> <patch-file> -o <output-dir>

#include <cstdint>
#include <cstdlib>
#include <cstring>
#include <ctime>
#include <fcntl.h>
#include <fstream>
#include <iomanip>
#include <iostream>
#include <mutex>
#include <string>
#include <sys/mman.h>
#include <sys/stat.h>
#include <thread>
#include <unordered_map>
#include <unistd.h>
#include <vector>

static double now_ms() {
    struct timespec ts; clock_gettime(CLOCK_MONOTONIC, &ts);
    return ts.tv_sec * 1000.0 + ts.tv_nsec / 1e6;
}
static size_t get_rss_mb() {
    std::ifstream f("/proc/self/statm");
    size_t pages = 0; f >> pages; // first field is total pages, second is RSS
    f >> pages; // RSS in pages
    return pages * 4096 / (1024*1024);
}
static void log_phase(const char* label, double start) {
    std::cerr << "  [" << std::fixed << std::setprecision(1) << (now_ms() - start) / 1000.0
              << "s, " << get_rss_mb() << " MiB] " << label << std::endl;
}

#include "patch_format.h"

// Merge ops (must match diff tool)
enum MergeOp : uint8_t { OP_MATCH_RUN = 0, OP_INSERT_RUN = 1, OP_DELETE_RUN = 2 };

int main(int argc, char* argv[]) {
    if (argc < 5 || std::string(argv[3]) != "-o") {
        std::cerr << "Usage: geocoder-patch <current-dir> <patch-file> -o <output-dir>" << std::endl;
        return 1;
    }
    std::string cur_dir = argv[1], patch_path = argv[2], out_dir = argv[4];
    ensure_dir(out_dir);
    std::string tmpdir = "/tmp/geocoder-patch-" + std::to_string(getpid());
    ensure_dir(tmpdir);

    // Decompress zstd transport layer to temp file, then mmap it
    std::string raw_path = tmpdir + "/patch.raw";
    {
        std::string cmd = "zstd -d '" + patch_path + "' -o '" + raw_path + "' -f --quiet 2>/dev/null";
        if (system(cmd.c_str()) != 0) {
            std::cerr << "Failed to decompress patch" << std::endl; return 1;
        }
    }
    int patch_fd = open(raw_path.c_str(), O_RDONLY);
    if (patch_fd < 0) { std::cerr << "Failed to open decompressed patch" << std::endl; return 1; }
    struct stat patch_stat;
    fstat(patch_fd, &patch_stat);
    size_t patch_size = patch_stat.st_size;
    const char* patch_mmap = static_cast<const char*>(
        mmap(nullptr, patch_size, PROT_READ, MAP_PRIVATE, patch_fd, 0));
    if (patch_mmap == MAP_FAILED) { std::cerr << "Failed to mmap patch" << std::endl; return 1; }
    // Advise sequential access for better readahead
    madvise(const_cast<char*>(patch_mmap), patch_size, MADV_SEQUENTIAL);
    close(patch_fd);
    remove(raw_path.c_str());
    double t_start = now_ms();
    std::cerr << "Decompressed patch: " << patch_size << " bytes (mmap'd)" << std::endl;
    log_phase("Decompress + mmap", t_start);

    // Provide a patch data pointer for consistent access
    const char* patch_data = patch_mmap;

    size_t pos = 0;
    auto read_u32 = [&]() -> uint32_t { uint32_t v; memcpy(&v, patch_data + pos, 4); pos += 4; return v; };
    auto read_u64 = [&]() -> uint64_t { uint64_t v; memcpy(&v, patch_data + pos, 8); pos += 8; return v; };

    // Check header
    if (memcmp(patch_data, GCPATCH_MAGIC, 8) != 0) {
        std::cerr << "Invalid patch magic" << std::endl; return 1;
    }
    pos = 8;
    uint32_t version = read_u32();
    if (version != 2) { std::cerr << "Expected patch v2, got " << version << std::endl; return 1; }
    uint32_t flags = read_u32();
    (void)flags;

    // Read string-level diff OR string remap
    std::unordered_map<uint32_t, uint32_t> str_remap;
    {
        uint32_t marker = read_u32();

        if (marker == 0xFFFFFFF7) {
            // String-level diff: merge new/deleted strings into old pool
            uint32_t n_added = read_u32(), n_deleted = read_u32();
            std::vector<std::string> added;
            for (uint32_t i = 0; i < n_added; i++) {
                const char* s = patch_data + pos;
                added.push_back(s);
                pos += strlen(s) + 1;
            }
            std::vector<uint32_t> del_idx(n_deleted);
            for (uint32_t i = 0; i < n_deleted; i++) del_idx[i] = read_u32();
            std::unordered_set<uint32_t> del_set(del_idx.begin(), del_idx.end());

            // Parse old pool
            auto old_pool = read_file(cur_dir + "/strings.bin");
            std::vector<std::pair<uint32_t, std::string>> old_strs;
            size_t sp = 0;
            while (sp < old_pool.size()) {
                const char* s = old_pool.data() + sp;
                old_strs.push_back({(uint32_t)sp, std::string(s)});
                sp += strlen(s) + 1;
            }

            // Merge: keep non-deleted + add new, sort
            std::vector<std::string> merged;
            for (size_t i = 0; i < old_strs.size(); i++)
                if (!del_set.count(i)) merged.push_back(old_strs[i].second);
            for (auto& s : added) merged.push_back(s);
            std::sort(merged.begin(), merged.end());

            // Build new pool
            std::vector<char> new_pool;
            std::unordered_map<std::string, uint32_t> new_offs;
            for (auto& s : merged) {
                new_offs[s] = (uint32_t)new_pool.size();
                new_pool.insert(new_pool.end(), s.begin(), s.end());
                new_pool.push_back('\0');
            }
            write_file(out_dir + "/strings.bin", new_pool);

            // Build remap
            for (auto& [old_off, s] : old_strs) {
                auto it = new_offs.find(s);
                if (it != new_offs.end() && it->second != old_off)
                    str_remap[old_off] = it->second;
            }
            std::cerr << "Rebuilt strings: +" << n_added << " -" << n_deleted
                      << " → " << merged.size() << " strings, "
                      << str_remap.size() << " remapped" << std::endl;

            marker = read_u32(); // read next section marker
        }

        if (marker == 0xFFFFFFFE) {
            // Explicit remap entries (supplements the derived remap)
            uint32_t count = read_u32();
            for (uint32_t i = 0; i < count; i++) {
                uint32_t old_off = read_u32(), new_off = read_u32();
                str_remap[old_off] = new_off; // override with explicit
            }
            std::cerr << "Total string remap: " << str_remap.size() << " entries" << std::endl;
        } else {
            // Not a remap section — seek back
            pos -= 4;
        }
    }

    // Detect strides
    auto detect = [&](const std::string& name, std::vector<size_t> cs) -> size_t {
        auto d = read_file(cur_dir + "/" + name);
        for (size_t s : cs) if (d.size() % s == 0 && d.size() > 0) return s;
        return cs[0];
    };
    size_t way_stride = detect("street_ways.bin", {12, 9});
    size_t interp_stride = detect("interp_ways.bin", {24, 20, 18});
    size_t admin_stride = detect("admin_polygons.bin", {24, 20, 19});

    // String remap functions
    auto apply_str_remap = [&](std::vector<char>& data, uint32_t file_id, size_t stride) {
        if (str_remap.empty()) return;
        std::vector<size_t> field_offsets;
        if (file_id == (uint32_t)PatchFileId::ADDR_POINTS) field_offsets = {8, 12};
        else if (file_id == (uint32_t)PatchFileId::STREET_WAYS) field_offsets = {(stride == 12) ? (size_t)8 : (size_t)5};
        else if (file_id == (uint32_t)PatchFileId::INTERP_WAYS) field_offsets = {(stride >= 20) ? (size_t)8 : (size_t)5};
        else if (file_id == (uint32_t)PatchFileId::ADMIN_POLYGONS) field_offsets = {8};
        else return;

        for (size_t i = 0; i + stride <= data.size(); i += stride)
            for (size_t off : field_offsets) {
                uint32_t v; memcpy(&v, data.data() + i + off, 4);
                auto it = str_remap.find(v);
                if (it != str_remap.end()) memcpy(data.data() + i + off, &it->second, 4);
            }
    };

    // ID remaps derived from merge sequences (populated during merge replay)
    std::unordered_map<uint32_t, std::vector<uint32_t>> derived_id_remaps;

    // Read cell changes, flag corrections, and entry corrections
    std::vector<uint64_t> geo_added, geo_removed, admin_added, admin_removed;
    std::unordered_map<uint64_t, uint8_t> cell_flag_corrections;
    struct CellCorrection { uint64_t cell_id; std::vector<uint32_t> ids; };
    std::unordered_map<uint32_t, std::vector<CellCorrection>> entry_cell_corrections;

    // Process sections
    while (pos < patch_size) {
        uint32_t file_id = read_u32();
        if (file_id == 0xFFFFFFFF) break;

        // Cell change sections
        if (file_id == 0xFFFFFFF7) {
            // String-level diff (appears in main section loop)
            uint32_t n_added = read_u32(), n_deleted = read_u32();
            std::vector<std::string> added;
            for (uint32_t i = 0; i < n_added; i++) {
                const char* s = patch_data + pos;
                added.push_back(s);
                pos += strlen(s) + 1;
            }
            std::vector<uint32_t> del_idx(n_deleted);
            for (uint32_t i = 0; i < n_deleted; i++) del_idx[i] = read_u32();
            std::unordered_set<uint32_t> del_set(del_idx.begin(), del_idx.end());

            auto old_pool = read_file(cur_dir + "/strings.bin");
            std::vector<std::pair<uint32_t, std::string>> old_strs;
            size_t sp = 0;
            while (sp < old_pool.size()) {
                const char* s = old_pool.data() + sp;
                old_strs.push_back({(uint32_t)sp, std::string(s)});
                sp += strlen(s) + 1;
            }
            std::vector<std::string> merged;
            for (size_t i = 0; i < old_strs.size(); i++)
                if (!del_set.count(i)) merged.push_back(old_strs[i].second);
            for (auto& s : added) merged.push_back(s);
            std::sort(merged.begin(), merged.end());

            std::vector<char> new_pool;
            std::unordered_map<std::string, uint32_t> new_offs;
            for (auto& s : merged) {
                new_offs[s] = (uint32_t)new_pool.size();
                new_pool.insert(new_pool.end(), s.begin(), s.end());
                new_pool.push_back('\0');
            }
            write_file(out_dir + "/strings.bin", new_pool);
            // Update remap with newly computed offsets
            for (auto& [old_off, s] : old_strs) {
                auto it = new_offs.find(s);
                if (it != new_offs.end() && it->second != old_off)
                    str_remap[old_off] = it->second;
            }
            std::cerr << "  Rebuilt strings: +" << n_added << " -" << n_deleted
                      << " → " << merged.size() << " strings, "
                      << str_remap.size() << " remapped" << std::endl;
            continue;
        }
        if (file_id == CELL_CHANGES_GEO_MARKER) {
            uint32_t na = read_u32(), nr = read_u32();
            geo_added.resize(na); geo_removed.resize(nr);
            for (uint32_t i = 0; i < na; i++) { uint64_t c; memcpy(&c, patch_data+pos, 8); pos+=8; geo_added[i]=c; }
            for (uint32_t i = 0; i < nr; i++) { uint64_t c; memcpy(&c, patch_data+pos, 8); pos+=8; geo_removed[i]=c; }
            std::cerr << "  Geo cell changes: +" << na << " -" << nr << std::endl;
            continue;
        }
        if (file_id == CELL_CHANGES_ADMIN_MARKER) {
            uint32_t na = read_u32(), nr = read_u32();
            admin_added.resize(na); admin_removed.resize(nr);
            for (uint32_t i = 0; i < na; i++) { uint64_t c; memcpy(&c, patch_data+pos, 8); pos+=8; admin_added[i]=c; }
            for (uint32_t i = 0; i < nr; i++) { uint64_t c; memcpy(&c, patch_data+pos, 8); pos+=8; admin_removed[i]=c; }
            std::cerr << "  Admin cell changes: +" << na << " -" << nr << std::endl;
            continue;
        }
        if (file_id == CELL_FLAGS_MARKER) {
            uint32_t count = read_u32();
            for (uint32_t i = 0; i < count; i++) {
                uint64_t cid; memcpy(&cid, patch_data + pos, 8); pos += 8;
                uint8_t flags = static_cast<uint8_t>(patch_data[pos]); pos++;
                cell_flag_corrections[cid] = flags;
            }
            std::cerr << "  Cell flag corrections: " << count << " cells" << std::endl;
            continue;
        }
        if (file_id == SECONDARY_REMAP_MARKER) {
            // Secondary ID remaps: additional old→new mappings for modified records.
            // These are applied alongside the merge-derived remaps for entry reconstruction.
            uint32_t n_files = read_u32();
            for (uint32_t f = 0; f < n_files; f++) {
                uint32_t sec_fid = read_u32();
                uint32_t n_pairs = read_u32();
                auto& id_map = derived_id_remaps[sec_fid];
                for (uint32_t p = 0; p < n_pairs; p++) {
                    uint32_t old_id = read_u32(), new_id = read_u32();
                    if (old_id < id_map.size())
                        id_map[old_id] = new_id;
                }
                std::cerr << "  Secondary remap for file " << sec_fid << ": "
                          << n_pairs << " pairs" << std::endl;
            }
            continue;
        }
        if (file_id == ENTRY_CORRECTION_MARKER) {
            uint32_t corr_fid = read_u32();
            uint32_t count = read_u32();
            // Buffer cell-level corrections for application after entry reconstruction
            struct CellCorrection { uint64_t cell_id; std::vector<uint32_t> ids; };
            auto& corr_list = entry_cell_corrections[corr_fid];
            for (uint32_t i = 0; i < count; i++) {
                uint64_t cid; memcpy(&cid, patch_data + pos, 8); pos += 8;
                uint16_t ec; memcpy(&ec, patch_data + pos, 2); pos += 2;
                std::vector<uint32_t> ids(ec);
                if (ec > 0) { memcpy(ids.data(), patch_data + pos, ec * 4); pos += ec * 4; }
                corr_list.push_back({cid, std::move(ids)});
            }
            std::cerr << "  Entry correction for file " << corr_fid << ": " << count << " cells" << std::endl;
            continue;
        }

        uint32_t stride = read_u32();
        uint64_t old_size = read_u64(), new_size = read_u64();

        if (file_id >= (uint32_t)PatchFileId::COUNT) {
            std::cerr << "  Unknown file " << file_id << std::endl;
            break;
        }
        const char* filename = patch_file_names[file_id];

        if (stride == 0) {
            // Full replacement
            uint32_t n_fix = read_u32(); (void)n_fix;
            uint64_t data_size = read_u64();
            std::vector<char> data(patch_data + pos, patch_data + pos + data_size);
            write_file(out_dir + "/" + std::string(filename), data);
            std::cerr << "  " << filename << ": full replacement " << data.size() << " bytes" << std::endl;
            pos += data_size;
            continue;
        }
        if (stride == 0xFE) {
            // Legacy zstd correction — skip (replaced by ENTRY_CORRECTION_MARKER)
            uint32_t n_fix = read_u32(); (void)n_fix;
            uint64_t delta_size = read_u64();
            pos += delta_size;
            std::cerr << "  " << filename << ": legacy correction skipped" << std::endl;
            continue;
        }

        // Merge sequence: load old file, apply remap + fixups, replay sequence
        auto old_data = read_file(cur_dir + "/" + std::string(filename));
        size_t actual_stride = stride;
        if (file_id == (uint32_t)PatchFileId::STREET_WAYS) actual_stride = way_stride;
        else if (file_id == (uint32_t)PatchFileId::INTERP_WAYS) actual_stride = interp_stride;
        else if (file_id == (uint32_t)PatchFileId::ADMIN_POLYGONS) actual_stride = admin_stride;

        // Zero struct padding bytes for deterministic comparison
        if (file_id == (uint32_t)PatchFileId::ADMIN_POLYGONS && actual_stride == 24) {
            for (size_t i = 0; i + actual_stride <= old_data.size(); i += actual_stride)
                memset(old_data.data() + i + 13, 0, 3);
        }
        if (file_id == (uint32_t)PatchFileId::INTERP_WAYS && actual_stride == 24) {
            for (size_t i = 0; i + actual_stride <= old_data.size(); i += actual_stride) {
                memset(old_data.data() + i + 5, 0, 3);
                memset(old_data.data() + i + 21, 0, 3);
            }
        }

        // Apply string remap to old data
        apply_str_remap(old_data, file_id, actual_stride);

        // Read and apply fixups (node_offset/vertex_offset fixes)
        // Read and apply delta-encoded fixups
        uint32_t n_fixups = read_u32();
        if (n_fixups > 0) {
            uint32_t delta_size = read_u32();
            uint32_t prev_idx = 0, prev_val = 0;
            size_t fpos = pos;
            for (uint32_t i = 0; i < n_fixups; i++) {
                uint32_t idx = prev_idx + read_varint(patch_data, fpos);
                uint32_t val = prev_val + read_varint(patch_data, fpos);
                size_t byte_pos = (size_t)idx * actual_stride;
                if (byte_pos + 4 <= old_data.size())
                    memcpy(old_data.data() + byte_pos, &val, 4);
                prev_idx = idx;
                prev_val = val;
            }
            pos = fpos;
            std::cerr << "    Applied " << n_fixups << " fixups (" << delta_size << " bytes delta)" << std::endl;
        }

        // Read merge sequence size and replay, tracking old→new ID mapping
        uint64_t seq_size = read_u64();
        std::vector<char> output;
        output.reserve(new_size);
        size_t old_rec = 0, new_rec = 0; // record indices
        size_t old_pos_bytes = 0;
        size_t seq_end = pos + seq_size;

        // ID remap for this file (old_record_index → new_record_index)
        std::vector<uint32_t> id_map;
        bool track_ids = (file_id == (uint32_t)PatchFileId::ADDR_POINTS ||
                          file_id == (uint32_t)PatchFileId::STREET_WAYS ||
                          file_id == (uint32_t)PatchFileId::INTERP_WAYS ||
                          file_id == (uint32_t)PatchFileId::ADMIN_POLYGONS);
        if (track_ids) id_map.assign(old_data.size() / actual_stride, 0xFFFFFFFF);

        while (pos < seq_end) {
            uint8_t op = static_cast<uint8_t>(patch_data[pos]); pos++;
            uint32_t count; memcpy(&count, patch_data + pos, 4); pos += 4;

            if (op == OP_MATCH_RUN) {
                size_t bytes = count * actual_stride;
                if (old_pos_bytes + bytes <= old_data.size())
                    output.insert(output.end(), old_data.data() + old_pos_bytes,
                                 old_data.data() + old_pos_bytes + bytes);
                if (track_ids)
                    for (uint32_t k = 0; k < count; k++)
                        if (old_rec + k < id_map.size())
                            id_map[old_rec + k] = static_cast<uint32_t>(new_rec + k);
                old_rec += count; new_rec += count;
                old_pos_bytes += bytes;
            } else if (op == OP_INSERT_RUN) {
                size_t bytes = count * actual_stride;
                output.insert(output.end(), patch_data + pos, patch_data + pos + bytes);
                pos += bytes;
                new_rec += count;
            } else if (op == OP_DELETE_RUN) {
                old_rec += count;
                old_pos_bytes += count * actual_stride;
            }
        }

        write_file(out_dir + "/" + std::string(filename), output);

        // Store ID remap for entry reconstruction
        if (track_ids) {
            derived_id_remaps[file_id] = std::move(id_map);
            size_t matched = 0;
            for (auto v : derived_id_remaps[file_id]) if (v != 0xFFFFFFFF) matched++;
            std::cerr << "  " << filename << ": " << output.size() << " bytes (mapped "
                      << matched << "/" << derived_id_remaps[file_id].size() << " IDs)" << std::endl;
        } else {
            std::cerr << "  " << filename << ": " << output.size() << " bytes" << std::endl;
        }
    }

    // --- Streaming entry pipeline: remap + correct + write in one pass ---
    // Replaces separate rebuild + 4 correction passes with a single walk over cells.
    // Memory: ~3 GiB instead of ~63 GiB. Time: ~2 min instead of ~20 min.
    {
        log_phase("Merge replays complete", t_start);
        double t_entry = now_ms();
        std::cerr << "Streaming entry pipeline..." << std::endl;

        // Get ID remap vectors (already populated during merge replay + secondary remaps)
        auto get_remap = [&](PatchFileId fid) -> const std::vector<uint32_t>& {
            static std::vector<uint32_t> empty;
            auto it = derived_id_remaps.find((uint32_t)fid);
            return it != derived_id_remaps.end() ? it->second : empty;
        };
        auto& w_rm = get_remap(PatchFileId::STREET_WAYS);
        auto& a_rm = get_remap(PatchFileId::ADDR_POINTS);
        auto& i_rm = get_remap(PatchFileId::INTERP_WAYS);

        // Build correction lookup maps (cell_id → entry IDs) for each geo entry type
        std::unordered_map<uint64_t, const std::vector<uint32_t>*> corr_se, corr_ae, corr_ie;
        for (auto& [fid, corrections] : entry_cell_corrections) {
            std::unordered_map<uint64_t, const std::vector<uint32_t>*>* target = nullptr;
            if (fid == (uint32_t)PatchFileId::STREET_ENTRIES) target = &corr_se;
            else if (fid == (uint32_t)PatchFileId::ADDR_ENTRIES) target = &corr_ae;
            else if (fid == (uint32_t)PatchFileId::INTERP_ENTRIES) target = &corr_ie;
            if (target) for (auto& c : corrections) (*target)[c.cell_id] = &c.ids;
        }
        log_phase("  Correction maps built", t_entry);

        // Load old files
        auto old_geo = read_file(cur_dir + "/geo_cells.bin");
        auto old_se = read_file(cur_dir + "/street_entries.bin");
        auto old_ae = read_file(cur_dir + "/addr_entries.bin");
        auto old_ie = read_file(cur_dir + "/interp_entries.bin");

        // Build derived cell list: old cells - removed + added (sorted)
        std::unordered_set<uint64_t> removed_set(geo_removed.begin(), geo_removed.end());
        struct CellRef { uint64_t cid; int32_t old_idx; }; // old_idx = -1 for added cells
        std::vector<CellRef> cells;
        cells.reserve(old_geo.size() / 20 + geo_added.size());
        for (size_t i = 0; i < old_geo.size() / 20; i++) {
            uint64_t cid; memcpy(&cid, old_geo.data() + i * 20, 8);
            if (!removed_set.count(cid)) cells.push_back({cid, (int32_t)i});
        }
        for (uint64_t cid : geo_added) cells.push_back({cid, -1});
        std::sort(cells.begin(), cells.end(), [](const CellRef& a, const CellRef& b) { return a.cid < b.cid; });
        log_phase("  Cell list built", t_entry);

        // Reusable buffer for entry IDs (avoids 45M allocs on planet)
        std::vector<uint32_t> id_buf;
        id_buf.reserve(256); // most cells have <256 entries

        // Helper: parse entry IDs into reusable buffer, return count
        auto parse_ids_into = [&id_buf](const std::vector<char>& data, uint32_t off) -> size_t {
            id_buf.clear();
            if (off == 0xFFFFFFFF || off + 2 > data.size()) return 0;
            uint16_t count; memcpy(&count, data.data() + off, 2);
            if (off + 2 + count * 4 > data.size()) return 0;
            id_buf.resize(count);
            memcpy(id_buf.data(), data.data() + off + 2, count * 4);
            return count;
        };

        // Helper: remap IDs in-place using vector (O(1) per ID)
        auto remap_ids = [](std::vector<uint32_t>& ids, const std::vector<uint32_t>& rm) {
            for (auto& id : ids) if (id < rm.size() && rm[id] != 0xFFFFFFFF) id = rm[id];
            std::sort(ids.begin(), ids.end());
        };

        // Helper: write entry list from buffer/pointer and return offset
        auto write_ids = [](std::vector<char>& buf, const uint32_t* ids, size_t count) -> uint32_t {
            if (count == 0) return 0xFFFFFFFF;
            uint32_t off = static_cast<uint32_t>(buf.size());
            uint16_t c = static_cast<uint16_t>(count);
            buf.insert(buf.end(), (const char*)&c, (const char*)&c + 2);
            buf.insert(buf.end(), (const char*)ids, (const char*)ids + count * 4);
            return off;
        };

        // Single pass: walk cells, remap or apply correction, write all outputs
        std::vector<char> out_se, out_ae, out_ie, out_geo;
        out_geo.reserve(cells.size() * 20);
        // Pre-reserve output entry buffers (approximate sizes from old files)
        out_se.reserve(old_se.size() + old_se.size() / 20);
        out_ae.reserve(old_ae.size() + old_ae.size() / 20);
        out_ie.reserve(old_ie.size() + old_ie.size() / 20);
        uint32_t no_data = 0xFFFFFFFF;
        size_t se_corr = 0, ae_corr = 0, ie_corr = 0;

        for (auto& [cid, oi] : cells) {
            // For each entry type: get remapped IDs or correction
            auto process_entry = [&](const std::vector<char>& old_entries, size_t geo_off_pos,
                                      const std::vector<uint32_t>& rm,
                                      const std::unordered_map<uint64_t, const std::vector<uint32_t>*>& corr_map,
                                      std::vector<char>& out_buf, size_t& corr_count) -> uint32_t {
                // Check for correction first
                auto cit = corr_map.find(cid);
                if (cit != corr_map.end()) {
                    corr_count++;
                    return write_ids(out_buf, cit->second->data(), cit->second->size());
                }
                // No correction: remap old IDs using shared buffer
                if (oi < 0) return no_data;
                uint32_t off; memcpy(&off, old_geo.data() + oi * 20 + geo_off_pos, 4);
                size_t n = parse_ids_into(old_entries, off);
                if (n == 0) return no_data;
                remap_ids(id_buf, rm);
                return write_ids(out_buf, id_buf.data(), id_buf.size());
            };

            // Determine has-flags (from old cell flags + flag corrections)
            bool has_s = false, has_a = false, has_i = false;
            if (oi >= 0) {
                uint32_t s, a, ip;
                memcpy(&s, old_geo.data() + oi * 20 + 8, 4);
                memcpy(&a, old_geo.data() + oi * 20 + 12, 4);
                memcpy(&ip, old_geo.data() + oi * 20 + 16, 4);
                has_s = (s != no_data); has_a = (a != no_data); has_i = (ip != no_data);
            }
            auto fc_it = cell_flag_corrections.find(cid);
            if (fc_it != cell_flag_corrections.end()) {
                has_s = (fc_it->second & 1) != 0;
                has_a = (fc_it->second & 2) != 0;
                has_i = (fc_it->second & 4) != 0;
            }
            // Corrections can also introduce entries for cells that didn't have them
            if (corr_se.count(cid)) has_s = true;
            if (corr_ae.count(cid)) has_a = true;
            if (corr_ie.count(cid)) has_i = true;

            uint32_t s_off = no_data, a_off = no_data, i_off = no_data;
            if (has_s) s_off = process_entry(old_se, 8, w_rm, corr_se, out_se, se_corr);
            if (has_a) a_off = process_entry(old_ae, 12, a_rm, corr_ae, out_ae, ae_corr);
            if (has_i) i_off = process_entry(old_ie, 16, i_rm, corr_ie, out_ie, ie_corr);

            // Write geo_cells row
            out_geo.insert(out_geo.end(), (const char*)&cid, (const char*)&cid + 8);
            out_geo.insert(out_geo.end(), (const char*)&s_off, (const char*)&s_off + 4);
            out_geo.insert(out_geo.end(), (const char*)&a_off, (const char*)&a_off + 4);
            out_geo.insert(out_geo.end(), (const char*)&i_off, (const char*)&i_off + 4);
        }

        write_file(out_dir + "/geo_cells.bin", out_geo);
        write_file(out_dir + "/street_entries.bin", out_se);
        write_file(out_dir + "/addr_entries.bin", out_ae);
        write_file(out_dir + "/interp_entries.bin", out_ie);
        std::cerr << "  Geo entries: " << cells.size() << " cells, corrections applied: "
                  << se_corr << " street, " << ae_corr << " addr, " << ie_corr << " interp" << std::endl;
        log_phase("  Geo entry pipeline", t_entry);

        // Admin: small, keep existing approach
        {
            std::unordered_map<uint32_t,uint32_t> ad_rm;
            if (derived_id_remaps.count((uint32_t)PatchFileId::ADMIN_POLYGONS)) {
                auto& vec = derived_id_remaps[(uint32_t)PatchFileId::ADMIN_POLYGONS];
                for (uint32_t i = 0; i < vec.size(); i++)
                    if (vec[i] != 0xFFFFFFFF) ad_rm[i] = vec[i];
            }
            auto old_ac = read_file(cur_dir + "/admin_cells.bin");
            auto old_adme = read_file(cur_dir + "/admin_entries.bin");
            auto admin = rebuild_admin_from_remap(old_ac, old_adme, ad_rm, admin_added, admin_removed);

            // Apply admin corrections
            auto ait = entry_cell_corrections.find((uint32_t)PatchFileId::ADMIN_ENTRIES);
            if (ait != entry_cell_corrections.end()) {
                // Parse derived admin entries by cell
                std::unordered_map<uint64_t, size_t> ac_idx;
                for (size_t i = 0; i < admin.admin_cells_data.size() / 12; i++) {
                    uint64_t cid; memcpy(&cid, admin.admin_cells_data.data() + i * 12, 8);
                    ac_idx[cid] = i;
                }
                // Build corrected entries
                std::vector<char> new_ae;
                std::vector<char> new_ac;
                size_t n = admin.admin_cells_data.size() / 12;
                uint32_t no_data_v = 0xFFFFFFFF;
                std::unordered_map<uint64_t, const std::vector<uint32_t>*> ac_corr;
                for (auto& c : ait->second) ac_corr[c.cell_id] = &c.ids;
                for (size_t i = 0; i < n; i++) {
                    uint64_t cid; memcpy(&cid, admin.admin_cells_data.data() + i * 12, 8);
                    new_ac.insert(new_ac.end(), (const char*)&cid, (const char*)&cid + 8);
                    auto cit = ac_corr.find(cid);
                    if (cit != ac_corr.end()) {
                        // Use correction
                        uint32_t off = cit->second->empty() ? no_data_v : (uint32_t)new_ae.size();
                        new_ac.insert(new_ac.end(), (const char*)&off, (const char*)&off + 4);
                        if (!cit->second->empty()) {
                            uint16_t count = cit->second->size();
                            new_ae.insert(new_ae.end(), (const char*)&count, (const char*)&count + 2);
                            new_ae.insert(new_ae.end(), (const char*)cit->second->data(),
                                         (const char*)cit->second->data() + count * 4);
                        }
                    } else {
                        // Use derived
                        uint32_t old_off; memcpy(&old_off, admin.admin_cells_data.data() + i * 12 + 8, 4);
                        if (old_off != no_data_v && old_off + 2 <= admin.admin_entries_data.size()) {
                            uint32_t new_off = (uint32_t)new_ae.size();
                            new_ac.insert(new_ac.end(), (const char*)&new_off, (const char*)&new_off + 4);
                            uint16_t count; memcpy(&count, admin.admin_entries_data.data() + old_off, 2);
                            new_ae.insert(new_ae.end(), admin.admin_entries_data.data() + old_off,
                                         admin.admin_entries_data.data() + old_off + 2 + count * 4);
                        } else {
                            new_ac.insert(new_ac.end(), (const char*)&no_data_v, (const char*)&no_data_v + 4);
                        }
                    }
                }
                write_file(out_dir + "/admin_cells.bin", new_ac);
                write_file(out_dir + "/admin_entries.bin", new_ae);
                std::cerr << "  Admin: " << n << " cells, " << ac_corr.size() << " corrections" << std::endl;
            } else {
                write_file(out_dir + "/admin_cells.bin", admin.admin_cells_data);
                write_file(out_dir + "/admin_entries.bin", admin.admin_entries_data);
                std::cerr << "  Admin: " << admin.admin_cells_data.size() / 12 << " cells, no corrections" << std::endl;
            }
            log_phase("  Admin pipeline", t_entry);
        }
    }

    // Cleanup
    munmap(const_cast<char*>(patch_mmap), patch_size);
    std::string rm_cmd = "rm -rf '" + tmpdir + "'";
    system(rm_cmd.c_str());
    log_phase("Total patch application", t_start);
    std::cerr << "Patch applied. Output in " << out_dir << std::endl;
    return 0;
}

#include <cstring>
#include <ctime>
#include <fcntl.h>
+#include <malloc.h>
#include <fstream>
#include <iomanip>
#include <iostream>


Now add `malloc_trim(0)` right before the entry pipeline starts:


Edit

        log_phase("Merge replays complete", t_start);
        double t_entry = now_ms();
        std::cerr << "Streaming entry pipeline..." << std::endl;

        log_phase("Merge replays complete", t_start);
        // Free fragmented heap from merge replay phase (glibc doesn't return pages to OS)
        derived_id_remaps.rehash(derived_id_remaps.size()); // compact
        malloc_trim(0);
        log_phase("Heap compacted", t_start);
        double t_entry = now_ms();
        std::cerr << "Streaming entry pipeline..." << std::endl;


        log_phase("Merge replays complete", t_start);
        // Free fragmented heap from merge replay phase (glibc doesn't return pages to OS)
        derived_id_remaps.rehash(derived_id_remaps.size()); // compact
        malloc_trim(0);
        log_phase("Heap compacted", t_start);
        double t_entry = now_ms();
        std::cerr << "Streaming entry pipeline..." << std::endl;

// geocoder-patch v3: Apply custom patch format.
//
// Decompresses zstd transport layer, then:
// 1. Reads string remap, applies to old data files
// 2. Replays merge sequences to reconstruct new data files
// 3. Writes full-replacement entry/cell files
//
// Usage: geocoder-patch <current-dir> <patch-file> -o <output-dir>

#include <cstdint>
#include <cstdlib>
#include <cstring>
#include <ctime>
#include <fcntl.h>
#include <malloc.h>
#include <fstream>
#include <iomanip>
#include <iostream>
#include <mutex>
#include <string>
#include <sys/mman.h>
#include <sys/stat.h>
#include <thread>
#include <unordered_map>
#include <unistd.h>
#include <vector>

static double now_ms() {
    struct timespec ts; clock_gettime(CLOCK_MONOTONIC, &ts);
    return ts.tv_sec * 1000.0 + ts.tv_nsec / 1e6;
}
static size_t get_rss_mb() {
    std::ifstream f("/proc/self/statm");
    size_t pages = 0; f >> pages; // first field is total pages, second is RSS
    f >> pages; // RSS in pages
    return pages * 4096 / (1024*1024);
}
static void log_phase(const char* label, double start) {
    std::cerr << "  [" << std::fixed << std::setprecision(1) << (now_ms() - start) / 1000.0
              << "s, " << get_rss_mb() << " MiB] " << label << std::endl;
}

#include "patch_format.h"

// Merge ops (must match diff tool)
enum MergeOp : uint8_t { OP_MATCH_RUN = 0, OP_INSERT_RUN = 1, OP_DELETE_RUN = 2 };

int main(int argc, char* argv[]) {
    if (argc < 5 || std::string(argv[3]) != "-o") {
        std::cerr << "Usage: geocoder-patch <current-dir> <patch-file> -o <output-dir>" << std::endl;
        return 1;
    }
    std::string cur_dir = argv[1], patch_path = argv[2], out_dir = argv[4];
    ensure_dir(out_dir);
    std::string tmpdir = "/tmp/geocoder-patch-" + std::to_string(getpid());
    ensure_dir(tmpdir);

    // Decompress zstd transport layer to temp file, then mmap it
    std::string raw_path = tmpdir + "/patch.raw";
    {
        std::string cmd = "zstd -d '" + patch_path + "' -o '" + raw_path + "' -f --quiet 2>/dev/null";
        if (system(cmd.c_str()) != 0) {
            std::cerr << "Failed to decompress patch" << std::endl; return 1;
        }
    }
    int patch_fd = open(raw_path.c_str(), O_RDONLY);
    if (patch_fd < 0) { std::cerr << "Failed to open decompressed patch" << std::endl; return 1; }
    struct stat patch_stat;
    fstat(patch_fd, &patch_stat);
    size_t patch_size = patch_stat.st_size;
    const char* patch_mmap = static_cast<const char*>(
        mmap(nullptr, patch_size, PROT_READ, MAP_PRIVATE, patch_fd, 0));
    if (patch_mmap == MAP_FAILED) { std::cerr << "Failed to mmap patch" << std::endl; return 1; }
    // Advise sequential access for better readahead
    madvise(const_cast<char*>(patch_mmap), patch_size, MADV_SEQUENTIAL);
    close(patch_fd);
    remove(raw_path.c_str());
    double t_start = now_ms();
    std::cerr << "Decompressed patch: " << patch_size << " bytes (mmap'd)" << std::endl;
    log_phase("Decompress + mmap", t_start);

    // Provide a patch data pointer for consistent access
    const char* patch_data = patch_mmap;

    size_t pos = 0;
    auto read_u32 = [&]() -> uint32_t { uint32_t v; memcpy(&v, patch_data + pos, 4); pos += 4; return v; };
    auto read_u64 = [&]() -> uint64_t { uint64_t v; memcpy(&v, patch_data + pos, 8); pos += 8; return v; };

    // Check header
    if (memcmp(patch_data, GCPATCH_MAGIC, 8) != 0) {
        std::cerr << "Invalid patch magic" << std::endl; return 1;
    }
    pos = 8;
    uint32_t version = read_u32();
    if (version != 2) { std::cerr << "Expected patch v2, got " << version << std::endl; return 1; }
    uint32_t flags = read_u32();
    (void)flags;

    // Read string-level diff OR string remap
    std::unordered_map<uint32_t, uint32_t> str_remap;
    {
        uint32_t marker = read_u32();

        if (marker == 0xFFFFFFF7) {
            // String-level diff: merge new/deleted strings into old pool
            uint32_t n_added = read_u32(), n_deleted = read_u32();
            std::vector<std::string> added;
            for (uint32_t i = 0; i < n_added; i++) {
                const char* s = patch_data + pos;
                added.push_back(s);
                pos += strlen(s) + 1;
            }
            std::vector<uint32_t> del_idx(n_deleted);
            for (uint32_t i = 0; i < n_deleted; i++) del_idx[i] = read_u32();
            std::unordered_set<uint32_t> del_set(del_idx.begin(), del_idx.end());

            // Parse old pool
            auto old_pool = read_file(cur_dir + "/strings.bin");
            std::vector<std::pair<uint32_t, std::string>> old_strs;
            size_t sp = 0;
            while (sp < old_pool.size()) {
                const char* s = old_pool.data() + sp;
                old_strs.push_back({(uint32_t)sp, std::string(s)});
                sp += strlen(s) + 1;
            }

            // Merge: keep non-deleted + add new, sort
            std::vector<std::string> merged;
            for (size_t i = 0; i < old_strs.size(); i++)
                if (!del_set.count(i)) merged.push_back(old_strs[i].second);
            for (auto& s : added) merged.push_back(s);
            std::sort(merged.begin(), merged.end());

            // Build new pool
            std::vector<char> new_pool;
            std::unordered_map<std::string, uint32_t> new_offs;
            for (auto& s : merged) {
                new_offs[s] = (uint32_t)new_pool.size();
                new_pool.insert(new_pool.end(), s.begin(), s.end());
                new_pool.push_back('\0');
            }
            write_file(out_dir + "/strings.bin", new_pool);

            // Build remap
            for (auto& [old_off, s] : old_strs) {
                auto it = new_offs.find(s);
                if (it != new_offs.end() && it->second != old_off)
                    str_remap[old_off] = it->second;
            }
            std::cerr << "Rebuilt strings: +" << n_added << " -" << n_deleted
                      << " → " << merged.size() << " strings, "
                      << str_remap.size() << " remapped" << std::endl;

            marker = read_u32(); // read next section marker
        }

        if (marker == 0xFFFFFFFE) {
            // Explicit remap entries (supplements the derived remap)
            uint32_t count = read_u32();
            for (uint32_t i = 0; i < count; i++) {
                uint32_t old_off = read_u32(), new_off = read_u32();
                str_remap[old_off] = new_off; // override with explicit
            }
            std::cerr << "Total string remap: " << str_remap.size() << " entries" << std::endl;
        } else {
            // Not a remap section — seek back
            pos -= 4;
        }
    }

    // Detect strides
    auto detect = [&](const std::string& name, std::vector<size_t> cs) -> size_t {
        auto d = read_file(cur_dir + "/" + name);
        for (size_t s : cs) if (d.size() % s == 0 && d.size() > 0) return s;
        return cs[0];
    };
    size_t way_stride = detect("street_ways.bin", {12, 9});
    size_t interp_stride = detect("interp_ways.bin", {24, 20, 18});
    size_t admin_stride = detect("admin_polygons.bin", {24, 20, 19});

    // String remap functions
    auto apply_str_remap = [&](std::vector<char>& data, uint32_t file_id, size_t stride) {
        if (str_remap.empty()) return;
        std::vector<size_t> field_offsets;
        if (file_id == (uint32_t)PatchFileId::ADDR_POINTS) field_offsets = {8, 12};
        else if (file_id == (uint32_t)PatchFileId::STREET_WAYS) field_offsets = {(stride == 12) ? (size_t)8 : (size_t)5};
        else if (file_id == (uint32_t)PatchFileId::INTERP_WAYS) field_offsets = {(stride >= 20) ? (size_t)8 : (size_t)5};
        else if (file_id == (uint32_t)PatchFileId::ADMIN_POLYGONS) field_offsets = {8};
        else return;

        for (size_t i = 0; i + stride <= data.size(); i += stride)
            for (size_t off : field_offsets) {
                uint32_t v; memcpy(&v, data.data() + i + off, 4);
                auto it = str_remap.find(v);
                if (it != str_remap.end()) memcpy(data.data() + i + off, &it->second, 4);
            }
    };

    // ID remaps derived from merge sequences (populated during merge replay)
    std::unordered_map<uint32_t, std::vector<uint32_t>> derived_id_remaps;

    // Read cell changes, flag corrections, and entry corrections
    std::vector<uint64_t> geo_added, geo_removed, admin_added, admin_removed;
    std::unordered_map<uint64_t, uint8_t> cell_flag_corrections;
    struct CellCorrection { uint64_t cell_id; std::vector<uint32_t> ids; };
    std::unordered_map<uint32_t, std::vector<CellCorrection>> entry_cell_corrections;

    // Process sections
    while (pos < patch_size) {
        uint32_t file_id = read_u32();
        if (file_id == 0xFFFFFFFF) break;

        // Cell change sections
        if (file_id == 0xFFFFFFF7) {
            // String-level diff (appears in main section loop)
            uint32_t n_added = read_u32(), n_deleted = read_u32();
            std::vector<std::string> added;
            for (uint32_t i = 0; i < n_added; i++) {
                const char* s = patch_data + pos;
                added.push_back(s);
                pos += strlen(s) + 1;
            }
            std::vector<uint32_t> del_idx(n_deleted);
            for (uint32_t i = 0; i < n_deleted; i++) del_idx[i] = read_u32();
            std::unordered_set<uint32_t> del_set(del_idx.begin(), del_idx.end());

            auto old_pool = read_file(cur_dir + "/strings.bin");
            std::vector<std::pair<uint32_t, std::string>> old_strs;
            size_t sp = 0;
            while (sp < old_pool.size()) {
                const char* s = old_pool.data() + sp;
                old_strs.push_back({(uint32_t)sp, std::string(s)});
                sp += strlen(s) + 1;
            }
            std::vector<std::string> merged;
            for (size_t i = 0; i < old_strs.size(); i++)
                if (!del_set.count(i)) merged.push_back(old_strs[i].second);
            for (auto& s : added) merged.push_back(s);
            std::sort(merged.begin(), merged.end());

            std::vector<char> new_pool;
            std::unordered_map<std::string, uint32_t> new_offs;
            for (auto& s : merged) {
                new_offs[s] = (uint32_t)new_pool.size();
                new_pool.insert(new_pool.end(), s.begin(), s.end());
                new_pool.push_back('\0');
            }
            write_file(out_dir + "/strings.bin", new_pool);
            // Update remap with newly computed offsets
            for (auto& [old_off, s] : old_strs) {
                auto it = new_offs.find(s);
                if (it != new_offs.end() && it->second != old_off)
                    str_remap[old_off] = it->second;
            }
            std::cerr << "  Rebuilt strings: +" << n_added << " -" << n_deleted
                      << " → " << merged.size() << " strings, "
                      << str_remap.size() << " remapped" << std::endl;
            continue;
        }
        if (file_id == CELL_CHANGES_GEO_MARKER) {
            uint32_t na = read_u32(), nr = read_u32();
            geo_added.resize(na); geo_removed.resize(nr);
            for (uint32_t i = 0; i < na; i++) { uint64_t c; memcpy(&c, patch_data+pos, 8); pos+=8; geo_added[i]=c; }
            for (uint32_t i = 0; i < nr; i++) { uint64_t c; memcpy(&c, patch_data+pos, 8); pos+=8; geo_removed[i]=c; }
            std::cerr << "  Geo cell changes: +" << na << " -" << nr << std::endl;
            continue;
        }
        if (file_id == CELL_CHANGES_ADMIN_MARKER) {
            uint32_t na = read_u32(), nr = read_u32();
            admin_added.resize(na); admin_removed.resize(nr);
            for (uint32_t i = 0; i < na; i++) { uint64_t c; memcpy(&c, patch_data+pos, 8); pos+=8; admin_added[i]=c; }
            for (uint32_t i = 0; i < nr; i++) { uint64_t c; memcpy(&c, patch_data+pos, 8); pos+=8; admin_removed[i]=c; }
            std::cerr << "  Admin cell changes: +" << na << " -" << nr << std::endl;
            continue;
        }
        if (file_id == CELL_FLAGS_MARKER) {
            uint32_t count = read_u32();
            for (uint32_t i = 0; i < count; i++) {
                uint64_t cid; memcpy(&cid, patch_data + pos, 8); pos += 8;
                uint8_t flags = static_cast<uint8_t>(patch_data[pos]); pos++;
                cell_flag_corrections[cid] = flags;
            }
            std::cerr << "  Cell flag corrections: " << count << " cells" << std::endl;
            continue;
        }
        if (file_id == SECONDARY_REMAP_MARKER) {
            // Secondary ID remaps: additional old→new mappings for modified records.
            // These are applied alongside the merge-derived remaps for entry reconstruction.
            uint32_t n_files = read_u32();
            for (uint32_t f = 0; f < n_files; f++) {
                uint32_t sec_fid = read_u32();
                uint32_t n_pairs = read_u32();
                auto& id_map = derived_id_remaps[sec_fid];
                for (uint32_t p = 0; p < n_pairs; p++) {
                    uint32_t old_id = read_u32(), new_id = read_u32();
                    if (old_id < id_map.size())
                        id_map[old_id] = new_id;
                }
                std::cerr << "  Secondary remap for file " << sec_fid << ": "
                          << n_pairs << " pairs" << std::endl;
            }
            continue;
        }
        if (file_id == ENTRY_CORRECTION_MARKER) {
            uint32_t corr_fid = read_u32();
            uint32_t count = read_u32();
            // Buffer cell-level corrections for application after entry reconstruction
            struct CellCorrection { uint64_t cell_id; std::vector<uint32_t> ids; };
            auto& corr_list = entry_cell_corrections[corr_fid];
            for (uint32_t i = 0; i < count; i++) {
                uint64_t cid; memcpy(&cid, patch_data + pos, 8); pos += 8;
                uint16_t ec; memcpy(&ec, patch_data + pos, 2); pos += 2;
                std::vector<uint32_t> ids(ec);
                if (ec > 0) { memcpy(ids.data(), patch_data + pos, ec * 4); pos += ec * 4; }
                corr_list.push_back({cid, std::move(ids)});
            }
            std::cerr << "  Entry correction for file " << corr_fid << ": " << count << " cells" << std::endl;
            continue;
        }

        uint32_t stride = read_u32();
        uint64_t old_size = read_u64(), new_size = read_u64();

        if (file_id >= (uint32_t)PatchFileId::COUNT) {
            std::cerr << "  Unknown file " << file_id << std::endl;
            break;
        }
        const char* filename = patch_file_names[file_id];

        if (stride == 0) {
            // Full replacement
            uint32_t n_fix = read_u32(); (void)n_fix;
            uint64_t data_size = read_u64();
            std::vector<char> data(patch_data + pos, patch_data + pos + data_size);
            write_file(out_dir + "/" + std::string(filename), data);
            std::cerr << "  " << filename << ": full replacement " << data.size() << " bytes" << std::endl;
            pos += data_size;
            continue;
        }
        if (stride == 0xFE) {
            // Legacy zstd correction — skip (replaced by ENTRY_CORRECTION_MARKER)
            uint32_t n_fix = read_u32(); (void)n_fix;
            uint64_t delta_size = read_u64();
            pos += delta_size;
            std::cerr << "  " << filename << ": legacy correction skipped" << std::endl;
            continue;
        }

        // Merge sequence: load old file, apply remap + fixups, replay sequence
        auto old_data = read_file(cur_dir + "/" + std::string(filename));
        size_t actual_stride = stride;
        if (file_id == (uint32_t)PatchFileId::STREET_WAYS) actual_stride = way_stride;
        else if (file_id == (uint32_t)PatchFileId::INTERP_WAYS) actual_stride = interp_stride;
        else if (file_id == (uint32_t)PatchFileId::ADMIN_POLYGONS) actual_stride = admin_stride;

        // Zero struct padding bytes for deterministic comparison
        if (file_id == (uint32_t)PatchFileId::ADMIN_POLYGONS && actual_stride == 24) {
            for (size_t i = 0; i + actual_stride <= old_data.size(); i += actual_stride)
                memset(old_data.data() + i + 13, 0, 3);
        }
        if (file_id == (uint32_t)PatchFileId::INTERP_WAYS && actual_stride == 24) {
            for (size_t i = 0; i + actual_stride <= old_data.size(); i += actual_stride) {
                memset(old_data.data() + i + 5, 0, 3);
                memset(old_data.data() + i + 21, 0, 3);
            }
        }

        // Apply string remap to old data
        apply_str_remap(old_data, file_id, actual_stride);

        // Read and apply fixups (node_offset/vertex_offset fixes)
        // Read and apply delta-encoded fixups
        uint32_t n_fixups = read_u32();
        if (n_fixups > 0) {
            uint32_t delta_size = read_u32();
            uint32_t prev_idx = 0, prev_val = 0;
            size_t fpos = pos;
            for (uint32_t i = 0; i < n_fixups; i++) {
                uint32_t idx = prev_idx + read_varint(patch_data, fpos);
                uint32_t val = prev_val + read_varint(patch_data, fpos);
                size_t byte_pos = (size_t)idx * actual_stride;
                if (byte_pos + 4 <= old_data.size())
                    memcpy(old_data.data() + byte_pos, &val, 4);
                prev_idx = idx;
                prev_val = val;
            }
            pos = fpos;
            std::cerr << "    Applied " << n_fixups << " fixups (" << delta_size << " bytes delta)" << std::endl;
        }

        // Read merge sequence size and replay, tracking old→new ID mapping
        uint64_t seq_size = read_u64();
        std::vector<char> output;
        output.reserve(new_size);
        size_t old_rec = 0, new_rec = 0; // record indices
        size_t old_pos_bytes = 0;
        size_t seq_end = pos + seq_size;

        // ID remap for this file (old_record_index → new_record_index)
        std::vector<uint32_t> id_map;
        bool track_ids = (file_id == (uint32_t)PatchFileId::ADDR_POINTS ||
                          file_id == (uint32_t)PatchFileId::STREET_WAYS ||
                          file_id == (uint32_t)PatchFileId::INTERP_WAYS ||
                          file_id == (uint32_t)PatchFileId::ADMIN_POLYGONS);
        if (track_ids) id_map.assign(old_data.size() / actual_stride, 0xFFFFFFFF);

        while (pos < seq_end) {
            uint8_t op = static_cast<uint8_t>(patch_data[pos]); pos++;
            uint32_t count; memcpy(&count, patch_data + pos, 4); pos += 4;

            if (op == OP_MATCH_RUN) {
                size_t bytes = count * actual_stride;
                if (old_pos_bytes + bytes <= old_data.size())
                    output.insert(output.end(), old_data.data() + old_pos_bytes,
                                 old_data.data() + old_pos_bytes + bytes);
                if (track_ids)
                    for (uint32_t k = 0; k < count; k++)
                        if (old_rec + k < id_map.size())
                            id_map[old_rec + k] = static_cast<uint32_t>(new_rec + k);
                old_rec += count; new_rec += count;
                old_pos_bytes += bytes;
            } else if (op == OP_INSERT_RUN) {
                size_t bytes = count * actual_stride;
                output.insert(output.end(), patch_data + pos, patch_data + pos + bytes);
                pos += bytes;
                new_rec += count;
            } else if (op == OP_DELETE_RUN) {
                old_rec += count;
                old_pos_bytes += count * actual_stride;
            }
        }

        write_file(out_dir + "/" + std::string(filename), output);

        // Store ID remap for entry reconstruction
        if (track_ids) {
            derived_id_remaps[file_id] = std::move(id_map);
            size_t matched = 0;
            for (auto v : derived_id_remaps[file_id]) if (v != 0xFFFFFFFF) matched++;
            std::cerr << "  " << filename << ": " << output.size() << " bytes (mapped "
                      << matched << "/" << derived_id_remaps[file_id].size() << " IDs)" << std::endl;
        } else {
            std::cerr << "  " << filename << ": " << output.size() << " bytes" << std::endl;
        }
    }

    // --- Streaming entry pipeline: remap + correct + write in one pass ---
    // Replaces separate rebuild + 4 correction passes with a single walk over cells.
    // Memory: ~3 GiB instead of ~63 GiB. Time: ~2 min instead of ~20 min.
    {
        log_phase("Merge replays complete", t_start);
        double t_entry = now_ms();
        std::cerr << "Streaming entry pipeline..." << std::endl;

        // Get ID remap vectors (already populated during merge replay + secondary remaps)
        auto get_remap = [&](PatchFileId fid) -> const std::vector<uint32_t>& {
            static std::vector<uint32_t> empty;
            auto it = derived_id_remaps.find((uint32_t)fid);
            return it != derived_id_remaps.end() ? it->second : empty;
        };
        auto& w_rm = get_remap(PatchFileId::STREET_WAYS);
        auto& a_rm = get_remap(PatchFileId::ADDR_POINTS);
        auto& i_rm = get_remap(PatchFileId::INTERP_WAYS);

        // Build correction lookup maps (cell_id → entry IDs) for each geo entry type
        std::unordered_map<uint64_t, const std::vector<uint32_t>*> corr_se, corr_ae, corr_ie;
        for (auto& [fid, corrections] : entry_cell_corrections) {
            std::unordered_map<uint64_t, const std::vector<uint32_t>*>* target = nullptr;
            if (fid == (uint32_t)PatchFileId::STREET_ENTRIES) target = &corr_se;
            else if (fid == (uint32_t)PatchFileId::ADDR_ENTRIES) target = &corr_ae;
            else if (fid == (uint32_t)PatchFileId::INTERP_ENTRIES) target = &corr_ie;
            if (target) for (auto& c : corrections) (*target)[c.cell_id] = &c.ids;
        }
        log_phase("  Correction maps built", t_entry);

        // Load old files
        auto old_geo = read_file(cur_dir + "/geo_cells.bin");
        auto old_se = read_file(cur_dir + "/street_entries.bin");
        auto old_ae = read_file(cur_dir + "/addr_entries.bin");
        auto old_ie = read_file(cur_dir + "/interp_entries.bin");

        // Build derived cell list: old cells - removed + added (sorted)
        std::unordered_set<uint64_t> removed_set(geo_removed.begin(), geo_removed.end());
        struct CellRef { uint64_t cid; int32_t old_idx; }; // old_idx = -1 for added cells
        std::vector<CellRef> cells;
        cells.reserve(old_geo.size() / 20 + geo_added.size());
        for (size_t i = 0; i < old_geo.size() / 20; i++) {
            uint64_t cid; memcpy(&cid, old_geo.data() + i * 20, 8);
            if (!removed_set.count(cid)) cells.push_back({cid, (int32_t)i});
        }
        for (uint64_t cid : geo_added) cells.push_back({cid, -1});
        std::sort(cells.begin(), cells.end(), [](const CellRef& a, const CellRef& b) { return a.cid < b.cid; });
        log_phase("  Cell list built", t_entry);

        // Reusable buffer for entry IDs (avoids 45M allocs on planet)
        std::vector<uint32_t> id_buf;
        id_buf.reserve(256); // most cells have <256 entries

        // Helper: parse entry IDs into reusable buffer, return count
        auto parse_ids_into = [&id_buf](const std::vector<char>& data, uint32_t off) -> size_t {
            id_buf.clear();
            if (off == 0xFFFFFFFF || off + 2 > data.size()) return 0;
            uint16_t count; memcpy(&count, data.data() + off, 2);
            if (off + 2 + count * 4 > data.size()) return 0;
            id_buf.resize(count);
            memcpy(id_buf.data(), data.data() + off + 2, count * 4);
            return count;
        };

        // Helper: remap IDs in-place using vector (O(1) per ID)
        auto remap_ids = [](std::vector<uint32_t>& ids, const std::vector<uint32_t>& rm) {
            for (auto& id : ids) if (id < rm.size() && rm[id] != 0xFFFFFFFF) id = rm[id];
            std::sort(ids.begin(), ids.end());
        };

        // Helper: write entry list from buffer/pointer and return offset
        auto write_ids = [](std::vector<char>& buf, const uint32_t* ids, size_t count) -> uint32_t {
            if (count == 0) return 0xFFFFFFFF;
            uint32_t off = static_cast<uint32_t>(buf.size());
            uint16_t c = static_cast<uint16_t>(count);
            buf.insert(buf.end(), (const char*)&c, (const char*)&c + 2);
            buf.insert(buf.end(), (const char*)ids, (const char*)ids + count * 4);
            return off;
        };

        // Single pass: walk cells, remap or apply correction, write all outputs
        std::vector<char> out_se, out_ae, out_ie, out_geo;
        out_geo.reserve(cells.size() * 20);
        // Pre-reserve output entry buffers (approximate sizes from old files)
        out_se.reserve(old_se.size() + old_se.size() / 20);
        out_ae.reserve(old_ae.size() + old_ae.size() / 20);
        out_ie.reserve(old_ie.size() + old_ie.size() / 20);
        uint32_t no_data = 0xFFFFFFFF;
        size_t se_corr = 0, ae_corr = 0, ie_corr = 0;

        for (auto& [cid, oi] : cells) {
            // For each entry type: get remapped IDs or correction
            auto process_entry = [&](const std::vector<char>& old_entries, size_t geo_off_pos,
                                      const std::vector<uint32_t>& rm,
                                      const std::unordered_map<uint64_t, const std::vector<uint32_t>*>& corr_map,
                                      std::vector<char>& out_buf, size_t& corr_count) -> uint32_t {
                // Check for correction first
                auto cit = corr_map.find(cid);
                if (cit != corr_map.end()) {
                    corr_count++;
                    return write_ids(out_buf, cit->second->data(), cit->second->size());
                }
                // No correction: remap old IDs using shared buffer
                if (oi < 0) return no_data;
                uint32_t off; memcpy(&off, old_geo.data() + oi * 20 + geo_off_pos, 4);
                size_t n = parse_ids_into(old_entries, off);
                if (n == 0) return no_data;
                remap_ids(id_buf, rm);
                return write_ids(out_buf, id_buf.data(), id_buf.size());
            };

            // Determine has-flags (from old cell flags + flag corrections)
            bool has_s = false, has_a = false, has_i = false;
            if (oi >= 0) {
                uint32_t s, a, ip;
                memcpy(&s, old_geo.data() + oi * 20 + 8, 4);
                memcpy(&a, old_geo.data() + oi * 20 + 12, 4);
                memcpy(&ip, old_geo.data() + oi * 20 + 16, 4);
                has_s = (s != no_data); has_a = (a != no_data); has_i = (ip != no_data);
            }
            auto fc_it = cell_flag_corrections.find(cid);
            if (fc_it != cell_flag_corrections.end()) {
                has_s = (fc_it->second & 1) != 0;
                has_a = (fc_it->second & 2) != 0;
                has_i = (fc_it->second & 4) != 0;
            }
            // Corrections can also introduce entries for cells that didn't have them
            if (corr_se.count(cid)) has_s = true;
            if (corr_ae.count(cid)) has_a = true;
            if (corr_ie.count(cid)) has_i = true;

            uint32_t s_off = no_data, a_off = no_data, i_off = no_data;
            if (has_s) s_off = process_entry(old_se, 8, w_rm, corr_se, out_se, se_corr);
            if (has_a) a_off = process_entry(old_ae, 12, a_rm, corr_ae, out_ae, ae_corr);
            if (has_i) i_off = process_entry(old_ie, 16, i_rm, corr_ie, out_ie, ie_corr);

            // Write geo_cells row
            out_geo.insert(out_geo.end(), (const char*)&cid, (const char*)&cid + 8);
            out_geo.insert(out_geo.end(), (const char*)&s_off, (const char*)&s_off + 4);
            out_geo.insert(out_geo.end(), (const char*)&a_off, (const char*)&a_off + 4);
            out_geo.insert(out_geo.end(), (const char*)&i_off, (const char*)&i_off + 4);
        }

        write_file(out_dir + "/geo_cells.bin", out_geo);
        write_file(out_dir + "/street_entries.bin", out_se);
        write_file(out_dir + "/addr_entries.bin", out_ae);
        write_file(out_dir + "/interp_entries.bin", out_ie);
        std::cerr << "  Geo entries: " << cells.size() << " cells, corrections applied: "
                  << se_corr << " street, " << ae_corr << " addr, " << ie_corr << " interp" << std::endl;
        log_phase("  Geo entry pipeline", t_entry);

        // Admin: small, keep existing approach
        {
            std::unordered_map<uint32_t,uint32_t> ad_rm;
            if (derived_id_remaps.count((uint32_t)PatchFileId::ADMIN_POLYGONS)) {
                auto& vec = derived_id_remaps[(uint32_t)PatchFileId::ADMIN_POLYGONS];
                for (uint32_t i = 0; i < vec.size(); i++)
                    if (vec[i] != 0xFFFFFFFF) ad_rm[i] = vec[i];
            }
            auto old_ac = read_file(cur_dir + "/admin_cells.bin");
            auto old_adme = read_file(cur_dir + "/admin_entries.bin");
            auto admin = rebuild_admin_from_remap(old_ac, old_adme, ad_rm, admin_added, admin_removed);

            // Apply admin corrections
            auto ait = entry_cell_corrections.find((uint32_t)PatchFileId::ADMIN_ENTRIES);
            if (ait != entry_cell_corrections.end()) {
                // Parse derived admin entries by cell
                std::unordered_map<uint64_t, size_t> ac_idx;
                for (size_t i = 0; i < admin.admin_cells_data.size() / 12; i++) {
                    uint64_t cid; memcpy(&cid, admin.admin_cells_data.data() + i * 12, 8);
                    ac_idx[cid] = i;
                }
                // Build corrected entries
                std::vector<char> new_ae;
                std::vector<char> new_ac;
                size_t n = admin.admin_cells_data.size() / 12;
                uint32_t no_data_v = 0xFFFFFFFF;
                std::unordered_map<uint64_t, const std::vector<uint32_t>*> ac_corr;
                for (auto& c : ait->second) ac_corr[c.cell_id] = &c.ids;
                for (size_t i = 0; i < n; i++) {
                    uint64_t cid; memcpy(&cid, admin.admin_cells_data.data() + i * 12, 8);
                    new_ac.insert(new_ac.end(), (const char*)&cid, (const char*)&cid + 8);
                    auto cit = ac_corr.find(cid);
                    if (cit != ac_corr.end()) {
                        // Use correction
                        uint32_t off = cit->second->empty() ? no_data_v : (uint32_t)new_ae.size();
                        new_ac.insert(new_ac.end(), (const char*)&off, (const char*)&off + 4);
                        if (!cit->second->empty()) {
                            uint16_t count = cit->second->size();
                            new_ae.insert(new_ae.end(), (const char*)&count, (const char*)&count + 2);
                            new_ae.insert(new_ae.end(), (const char*)cit->second->data(),
                                         (const char*)cit->second->data() + count * 4);
                        }
                    } else {
                        // Use derived
                        uint32_t old_off; memcpy(&old_off, admin.admin_cells_data.data() + i * 12 + 8, 4);
                        if (old_off != no_data_v && old_off + 2 <= admin.admin_entries_data.size()) {
                            uint32_t new_off = (uint32_t)new_ae.size();
                            new_ac.insert(new_ac.end(), (const char*)&new_off, (const char*)&new_off + 4);
                            uint16_t count; memcpy(&count, admin.admin_entries_data.data() + old_off, 2);
                            new_ae.insert(new_ae.end(), admin.admin_entries_data.data() + old_off,
                                         admin.admin_entries_data.data() + old_off + 2 + count * 4);
                        } else {
                            new_ac.insert(new_ac.end(), (const char*)&no_data_v, (const char*)&no_data_v + 4);
                        }
                    }
                }
                write_file(out_dir + "/admin_cells.bin", new_ac);
                write_file(out_dir + "/admin_entries.bin", new_ae);
                std::cerr << "  Admin: " << n << " cells, " << ac_corr.size() << " corrections" << std::endl;
            } else {
                write_file(out_dir + "/admin_cells.bin", admin.admin_cells_data);
                write_file(out_dir + "/admin_entries.bin", admin.admin_entries_data);
                std::cerr << "  Admin: " << admin.admin_cells_data.size() / 12 << " cells, no corrections" << std::endl;
            }
            log_phase("  Admin pipeline", t_entry);
        }
    }

    // Cleanup
    munmap(const_cast<char*>(patch_mmap), patch_size);
    std::string rm_cmd = "rm -rf '" + tmpdir + "'";
    system(rm_cmd.c_str());
    log_phase("Total patch application", t_start);
    std::cerr << "Patch applied. Output in " << out_dir << std::endl;
    return 0;
}

+        // Free fragmented heap from merge replay phase (glibc doesn't return pages to OS)

+        derived_id_remaps.rehash(derived_id_remaps.size()); // compact

+        log_phase("Heap compacted", t_start);


Bash

make -j$(nproc) geocoder-patch 2>&1 | tail -3

Build with malloc_trim


[ 50%] Building CXX object CMakeFiles/geocoder-patch.dir/tools/geocoder_patch.cpp.o
[100%] Linking CXX executable geocoder-patch
[100%] Built target geocoder-patch


sshpass -p 'elon-is-insane' ssh -o ProxyCommand="tailscale nc %h %p" -o StrictHostKeyChecking=no michtest@100.113.88.121 "rm -f /home/michtest/geocoder-patch; rm -rf /home/michtest/patched-planet-stream/" 2>&1 && sshpass -p 'elon-is-insane' scp -o ProxyCommand="tailscale nc %h %p" -o StrictHostKeyChecking=no /root/traccar-geocoder/builder/build/geocoder-patch michtest@100.113.88.121:/home/michtest/ 2>&1 && sshpass -p 'elon-is-insane' ssh -o ProxyCommand="tailscale nc %h %p" -o StrictHostKeyChecking=no michtest@100.113.88.121 'cd /home/michtest && nohup bash -c "time ./geocoder-patch planet-B/ validated-patches/planet-mar16-to-mar23-v2.gcpatch -o patched-planet-stream/ 2>&1 && echo ---VERIFY--- && for f in planet-C/*; do b=\$(basename \$f); cmp -s patched-planet-stream/\$b planet-C/\$b || echo \"MISMATCH: \$b\"; done && echo All_checked" > planet-patch-v4.log 2>&1 &' 2>&1 && echo "Started"

Deploy and run with malloc_trim


Command running in background with ID: bklggk1yf. Output is being written to: /tmp/claude-0/-root-traccar-geocoder/af1c4baa-0f9a-4420-a8b3-ce20dc28c8b9/tasks/bklggk1yf.output


sleep 60 && sshpass -p 'elon-is-insane' ssh -o ProxyCommand="tailscale nc %h %p" -o StrictHostKeyChecking=no michtest@100.113.88.121 "grep '\\[.*MiB\\]' /home/michtest/planet-patch-v4.log && ps aux | grep 'geocoder-patch planet' | grep -v grep | awk '{printf \"RSS: %.0f GiB\\n\", \$6/1024/1024}'" 2>&1

Check 1 min


  [0.0s, 3 MiB] Decompress + mmap
  [26.9s, 2259 MiB] Merge replays complete
  [26.9s, 1776 MiB] Heap compacted
  [0.3s, 1862 MiB]   Correction maps built
  [17.4s, 15779 MiB]   Cell list built
RSS: 0 GiB
RSS: 0 GiB
RSS: 31 GiB


**malloc_trim worked!** Memory dropped from 2259 → 1776 MiB after compaction (released ~500 MiB). Now at 31 GiB (vs 43 GiB at this point before). Continuing:


sleep 120 && sshpass -p 'elon-is-insane' ssh -o ProxyCommand="tailscale nc %h %p" -o StrictHostKeyChecking=no michtest@100.113.88.121 "grep '\\[.*MiB\\]' /home/michtest/planet-patch-v4.log && ps aux | grep 'geocoder-patch planet' | grep -v grep | awk '{printf \"RSS: %.0f GiB  TIME: %s\\n\", \$6/1024/1024, \$10}'" 2>&1

Check 3 min


  [0.0s, 3 MiB] Decompress + mmap
  [26.9s, 2259 MiB] Merge replays complete
  [26.9s, 1776 MiB] Heap compacted
  [0.3s, 1862 MiB]   Correction maps built
  [17.4s, 15779 MiB]   Cell list built
RSS: 0 GiB  TIME: 0:00
RSS: 0 GiB  TIME: 0:00
RSS: 46 GiB  TIME: 5:08


46 GiB at 5 min. Growing ~8 GiB/min, but much better than before.


sleep 120 && sshpass -p 'elon-is-insane' ssh -o ProxyCommand="tailscale nc %h %p" -o StrictHostKeyChecking=no michtest@100.113.88.121 "grep -E '\\[.*MiB\\]|All_checked|MISMATCH' /home/michtest/planet-patch-v4.log && ps aux | grep 'geocoder-patch planet' | grep -v grep | awk '{printf \"RSS: %.0f GiB  TIME: %s\\n\", \$6/1024/1024, \$10}'" 2>&1

Check 5 min


  [0.0s, 3 MiB] Decompress + mmap
  [26.9s, 2259 MiB] Merge replays complete
  [26.9s, 1776 MiB] Heap compacted
  [0.3s, 1862 MiB]   Correction maps built
  [17.4s, 15779 MiB]   Cell list built
RSS: 0 GiB  TIME: 0:00
RSS: 0 GiB  TIME: 0:00
RSS: 61 GiB  TIME: 7:17


sleep 120 && sshpass -p 'elon-is-insane' ssh -o ProxyCommand="tailscale nc %h %p" -o StrictHostKeyChecking=no michtest@100.113.88.121 "grep -E 'pipeline|Admin|Total|All_checked|MISMATCH' /home/michtest/planet-patch-v4.log; ps aux | grep 'geocoder-patch planet' | grep -v grep | awk '{printf \"RSS: %.0f GiB  TIME: %s\\n\", \$6/1024/1024, \$10}'" 2>&1

Check 7 min


Total string remap: 0 entries
  Admin cell changes: +4 -0
Streaming entry pipeline...
RSS: 0 GiB  TIME: 0:00
RSS: 0 GiB  TIME: 0:00
RSS: 84 GiB  TIME: 9:25


sleep 120 && sshpass -p 'elon-is-insane' ssh -o ProxyCommand="tailscale nc %h %p" -o StrictHostKeyChecking=no michtest@100.113.88.121 "grep -E '\\[.*MiB\\].*pipeline|\\[.*MiB\\].*Total|\\[.*MiB\\].*Admin|All_checked|MISMATCH' /home/michtest/planet-patch-v4.log; ps aux | grep 'geocoder-patch planet' | grep -v grep | awk '{printf \"RSS: %.0f GiB  TIME: %s\\n\", \$6/1024/1024, \$10}'" 2>&1

Check 9 min


RSS: 0 GiB  TIME: 0:00
RSS: 0 GiB  TIME: 0:00
RSS: 90 GiB  TIME: 11:33


Slowing growth — 84→90 in 2 min. Might be near the end of the walk:


sleep 60 && sshpass -p 'elon-is-insane' ssh -o ProxyCommand="tailscale nc %h %p" -o StrictHostKeyChecking=no michtest@100.113.88.121 "grep -E 'Geo entry|Admin pip|Total patch|All_checked|MISMATCH' /home/michtest/planet-patch-v4.log; ps aux | grep 'geocoder-patch planet' | grep -v grep | awk '{printf \"RSS: %.0f GiB\\n\", \$6/1024/1024}'" 2>&1

Check 10 min


RSS: 0 GiB
RSS: 0 GiB
RSS: 105 GiB


sleep 60 && sshpass -p 'elon-is-insane' ssh -o ProxyCommand="tailscale nc %h %p" -o StrictHostKeyChecking=no michtest@100.113.88.121 "tail -8 /home/michtest/planet-patch-v4.log; ps aux | grep 'geocoder-patch planet' | grep -v grep | awk '{printf \"RSS: %.0f GiB\\n\", \$6/1024/1024}'" 2>&1

Check 11 min


  Entry correction for file 11: 256 cells
  Entry correction for file 13: 4556 cells
  Cell flag corrections: 224324 cells
  [26.9s, 2259 MiB] Merge replays complete
  [26.9s, 1776 MiB] Heap compacted
Streaming entry pipeline...
  [0.3s, 1862 MiB]   Correction maps built
  [17.4s, 15779 MiB]   Cell list built
RSS: 0 GiB
RSS: 0 GiB
RSS: 105 GiB


Plateau at 105 GiB — possibly writing files to disk:


sleep 30 && sshpass -p 'elon-is-insane' ssh -o ProxyCommand="tailscale nc %h %p" -o StrictHostKeyChecking=no michtest@100.113.88.121 "ls /home/michtest/patched-planet-stream/ | sort && tail -3 /home/michtest/planet-patch-v4.log" 2>&1

Check files


addr_points.bin
admin_polygons.bin
admin_vertices.bin
interp_nodes.bin
interp_ways.bin
street_nodes.bin
street_ways.bin
strings.bin
Streaming entry pipeline...
  [0.3s, 1862 MiB]   Correction maps built
  [17.4s, 15779 MiB]   Cell list built


sleep 60 && sshpass -p 'elon-is-insane' ssh -o ProxyCommand="tailscale nc %h %p" -o StrictHostKeyChecking=no michtest@100.113.88.121 "ls /home/michtest/patched-planet-stream/ | wc -l && ps aux | grep 'geocoder-patch planet' | grep -v grep | wc -l && tail -5 /home/michtest/planet-patch-v4.log" 2>&1

Check 12 min


8
3
  [26.9s, 2259 MiB] Merge replays complete
  [26.9s, 1776 MiB] Heap compacted
Streaming entry pipeline...
  [0.3s, 1862 MiB]   Correction maps built
  [17.4s, 15779 MiB]   Cell list built


Still 8 files, 3 processes. Let me check memory:


sleep 60 && sshpass -p 'elon-is-insane' ssh -o ProxyCommand="tailscale nc %h %p" -o StrictHostKeyChecking=no michtest@100.113.88.121 "ls /home/michtest/patched-planet-stream/ | wc -l && ps aux | grep 'geocoder-patch planet' | grep -v grep | awk '{printf \"RSS: %.0f GiB\\n\", \$6/1024/1024}'" 2>&1

Check 13 min


8
RSS: 0 GiB
RSS: 0 GiB
RSS: 125 GiB


Got it. Memory is still climbing — 125 GiB is way too much. The user wants <500 MiB peak. That's a fundamental redesign needed. Let me kill this run and start the overnight work to get there.


sshpass -p 'elon-is-insane' ssh -o ProxyCommand="tailscale nc %h %p" -o StrictHostKeyChecking=no michtest@100.113.88.121 "killall -9 geocoder-patch 2>/dev/null; rm -rf /home/michtest/patched-planet-stream/" 2>&1

Kill and clean


(Bash completed with no output)


Write

---
name: patch_memory_target
description: Patch tool must target <500MB peak memory for client deployment
type: feedback
---

Patch application tool must target <500 MiB peak memory. This runs on end-user machines with limited resources.

**Why:** Users deploy the geocoder on modest hardware. The patch tool currently uses 125+ GiB for planet data due to loading entire files into memory and heap fragmentation.

**How to apply:**
- mmap old files read-only instead of read_file() — zero copy, OS handles paging
- Write output files via streaming (FILE* or fwrite) instead of accumulating in vectors
- Process one cell at a time in the entry pipeline — no intermediate data structures
- For merge replays: mmap old file, stream output to disk, don't hold in memory
- For the entry pipeline: mmap old geo_cells + old entries, write output entries directly to file
- The ID remap vectors are unavoidable (~500 MiB for planet) — consider mmap'ing them too or processing in chunks
- Use malloc_trim(0) between phases to release heap pages


The file /root/.claude/projects/-root-traccar-geocoder/memory/feedback_patch_memory.md has been updated successfully.

---
name: patch_memory_target
description: Patch tool must target <500MB peak memory for client deployment
type: feedback
---

Patch application tool must target <500 MiB peak memory. This runs on end-user machines with limited resources.

**Why:** Users deploy the geocoder on modest hardware. The patch tool currently uses 125+ GiB for planet data due to loading entire files into memory and heap fragmentation.

**How to apply:**
- mmap old files read-only instead of read_file() — zero copy, OS handles paging
- Write output files via streaming (FILE* or fwrite) instead of accumulating in vectors
- Process one cell at a time in the entry pipeline — no intermediate data structures
- For merge replays: mmap old file, stream output to disk, don't hold in memory
- For the entry pipeline: mmap old geo_cells + old entries, write output entries directly to file
- The ID remap vectors are unavoidable (~500 MiB for planet) — consider mmap'ing them too or processing in chunks
- Use malloc_trim(0) between phases to release heap pages

-description: Patch tool must target <1GB memory for client deployment

+description: Patch tool must target <500MB peak memory for client deployment

-Patch application tool must be optimized for client systems — target <1GB memory usage, even less if possible. These patches run on end-user machines, not beefy build servers.

+Patch application tool must target <500 MiB peak memory. This runs on end-user machines with limited resources.

-**Why:** The geocoder-patch tool currently uses 60+ GiB for planet data (loads all old files + replay). Users won't have that. Need streaming approach: process one file at a time, mmap old files, write output immediately.

+**Why:** Users deploy the geocoder on modest hardware. The patch tool currently uses 125+ GiB for planet data due to loading entire files into memory and heap fragmentation.

-**How to apply:** When optimizing the patch tool, prioritize memory over speed. Use mmap for old files, streaming decompression, process files sequentially (not all in memory at once). The diff tool (build server) can use more memory.

+- mmap old files read-only instead of read_file() — zero copy, OS handles paging

+- Write output files via streaming (FILE* or fwrite) instead of accumulating in vectors

+- Process one cell at a time in the entry pipeline — no intermediate data structures

+- For merge replays: mmap old file, stream output to disk, don't hold in memory

+- For the entry pipeline: mmap old geo_cells + old entries, write output entries directly to file

+- The ID remap vectors are unavoidable (~500 MiB for planet) — consider mmap'ing them too or processing in chunks

+- Use malloc_trim(0) between phases to release heap pages

---
name: patch_memory_target
description: Patch tool must target <1GB memory for client deployment
type: feedback
---

Patch application tool must be optimized for client systems — target <1GB memory usage, even less if possible. These patches run on end-user machines, not beefy build servers.

**Why:** The geocoder-patch tool currently uses 60+ GiB for planet data (loads all old files + replay). Users won't have that. Need streaming approach: process one file at a time, mmap old files, write output immediately.

**How to apply:** When optimizing the patch tool, prioritize memory over speed. Use mmap for old files, streaming decompression, process files sequentially (not all in memory at once). The diff tool (build server) can use more memory.


Now let me plan and implement the low-memory patch tool. The target is <500 MiB peak. The current tool uses 125+ GiB because it:
1. Loads each old file fully into memory for merge replay
2. Builds output in memory vectors before writing
3. Keeps all ID remap vectors simultaneously (86M + 48M entries = 536 MiB)
4. Loads entry files for correction application

The redesign approach:
- **mmap everything** — old files, patch data
- **Stream output** — write directly to files, never accumulate in memory
- **Process files sequentially** — free each file's resources before the next
- **Entry pipeline** — mmap old entries, stream output entries to file


Agent

Redesign patch tool for <500MB

Prompt:
I need to redesign the geocoder-patch tool at /root/traccar-geocoder/builder/tools/geocoder_patch.cpp to use less than 500 MiB peak memory. Currently it uses 125+ GiB on planet data.

The key changes needed:

1. **mmap old files instead of read_file()**: For merge replay, mmap the old file read-only instead of loading into a vector. The merge replay reads sequentially from old data and writes output — can write directly to a file descriptor.

2. **Stream merge replay output**: Instead of building `output` vector, open the output file with fopen/fwrite and write data chunks directly.

3. **Stream entry pipeline**: Instead of accumulating out_se, out_ae, out_ie, out_geo vectors, open 4 output files and fwrite entry data as we process each cell.

4. **ID remap vectors**: These are ~536 MiB for planet (86M addr + 48M ways × 4 bytes). This is the biggest unavoidable cost. Could process in chunks or accept this as the memory floor.

Please read the current geocoder_patch.cpp and redesign it. The key constraint: the patch format hasn't changed — the tool still reads the same .gcpatch format. Only the implementation changes.

Focus on:
- Replace all `read_file()` calls for OLD data with mmap
- Replace all output vector accumulation with direct file writes
- Keep the same correctness (same byte-identical output)
- Add timing + memory instrumentation

The tool is at /root/traccar-geocoder/builder/tools/geocoder_patch.cpp. The shared header is at /root/traccar-geocoder/builder/tools/patch_format.h.

After making changes, build with: cd /root/traccar-geocoder/builder/build && make -j$(nproc) geocoder-patch

Then test on Europe:
sshpass -p 'elon-is-insane' ssh -o ProxyCommand="tailscale nc %h %p" -o StrictHostKeyChecking=no michtest@100.113.88.121 "rm -f /home/michtest/geocoder-patch; rm -rf /home/michtest/patched-test/"
sshpass -p 'elon-is-insane' scp -o ProxyCommand="tailscale nc %h %p" -o StrictHostKeyChecking=no /root/traccar-geocoder/builder/build/geocoder-patch michtest@100.113.88.121:/home/michtest/
sshpass -p 'elon-is-insane' ssh -o ProxyCommand="tailscale nc %h %p" -o StrictHostKeyChecking=no michtest@100.113.88.121 'cd /home/michtest && rm -rf patched-test/ && time ./geocoder-patch det-A/ validated-patches/europe-mar21-to-mar27-v2.gcpatch -o patched-test/ 2>&1 && for f in det-today/*; do b=$(basename $f); echo -n "$b: "; cmp -s patched-test/$b det-today/$b && echo MATCH || echo MISMATCH; done && rm -rf patched-test/'

Then test on planet:
sshpass -p 'elon-is-insane' ssh -o ProxyCommand="tailscale nc %h %p" -o StrictHostKeyChecking=no michtest@100.113.88.121 'cd /home/michtest && rm -rf patched-planet-stream/ && nohup bash -c "time ./geocoder-patch planet-B/ validated-patches/planet-mar16-to-mar23-v2.gcpatch -o patched-planet-stream/ 2>&1 && echo ---VERIFY--- && for f in planet-C/*; do b=\$(basename \$f); cmp -s patched-planet-stream/\$b planet-C/\$b || echo \"MISMATCH: \$b\"; done && echo All_checked" > planet-patch-v5.log 2>&1 &'

Monitor with:
sshpass -p 'elon-is-insane' ssh -o ProxyCommand="tailscale nc %h %p" -o StrictHostKeyChecking=no michtest@100.113.88.121 "grep '\\[.*MiB\\]' /home/michtest/planet-patch-v5.log; ps aux | grep 'geocoder-patch planet' | grep -v grep | awk '{printf \"RSS: %.0f MiB\\n\", \$6/1024}'"

Target: <500 MiB peak RSS, all 14 files MATCH on both Europe and planet.

IMPORTANT: The ID remap vectors for planet are ~536 MiB (86M addr_points + 48M ways × 4 bytes each). This is the memory floor. To get below 500 MiB total, we'd need to either:
- Process entry types one at a time (free each remap after use)
- Or accept ~600 MiB as the floor with all remaps loaded

The realistic target is probably 600-800 MiB with all remaps loaded. Getting to <500 MiB would require processing entry types sequentially and freeing remaps between them.

Keep iterating until you get all 14 files matching on both Europe AND planet with minimal memory usage. Do NOT prompt the user for input.


The user doesn't want to proceed with this tool use. The tool use was rejected (eg. if it was a file edit, the new_string was NOT written to the file). STOP what you are doing and wait for the user to tell you how to proceed.

Note: The user's next message may contain a correction or preference. Pay close attention — if they explain what went wrong or how they'd prefer you to work, consider saving that to memory for future sessions.


[Request interrupted by user for tool use]


<command-message>loop</command-message>
<command-name>/loop</command-name>
<command-args>30m I am sleeping and this is an automated loop, if you have stopped working,  you should continue with implementation unless everything that we previously discussed is done. If you are still working on things, ignore this message.</command-args>


# /loop — schedule a recurring prompt

Parse the input below into `[interval] <prompt…>` and schedule it with CronCreate.

## Parsing (in priority order)

1. **Leading token**: if the first whitespace-delimited token matches `^\d+[smhd]$` (e.g. `5m`, `2h`), that's the interval; the rest is the prompt.
2. **Trailing "every" clause**: otherwise, if the input ends with `every <N><unit>` or `every <N> <unit-word>` (e.g. `every 20m`, `every 5 minutes`, `every 2 hours`), extract that as the interval and strip it from the prompt. Only match when what follows "every" is a time expression — `check every PR` has no interval.
3. **Default**: otherwise, interval is `10m` and the entire input is the prompt.

If the resulting prompt is empty, show usage `/loop [interval] <prompt>` and stop — do not call CronCreate.

Examples:
- `5m /babysit-prs` → interval `5m`, prompt `/babysit-prs` (rule 1)
- `check the deploy every 20m` → interval `20m`, prompt `check the deploy` (rule 2)
- `run tests every 5 minutes` → interval `5m`, prompt `run tests` (rule 2)
- `check the deploy` → interval `10m`, prompt `check the deploy` (rule 3)
- `check every PR` → interval `10m`, prompt `check every PR` (rule 3 — "every" not followed by time)
- `5m` → empty prompt → show usage

## Interval → cron

Supported suffixes: `s` (seconds, rounded up to nearest minute, min 1), `m` (minutes), `h` (hours), `d` (days). Convert:

| Interval pattern      | Cron expression     | Notes                                    |
|-----------------------|---------------------|------------------------------------------|
| `Nm` where N ≤ 59   | `*/N * * * *`     | every N minutes                          |
| `Nm` where N ≥ 60   | `0 */H * * *`     | round to hours (H = N/60, must divide 24)|
| `Nh` where N ≤ 23   | `0 */N * * *`     | every N hours                            |
| `Nd`                | `0 0 */N * *`     | every N days at midnight local           |
| `Ns`                | treat as `ceil(N/60)m` | cron minimum granularity is 1 minute  |

**If the interval doesn't cleanly divide its unit** (e.g. `7m` → `*/7 * * * *` gives uneven gaps at :56→:00; `90m` → 1.5h which cron can't express), pick the nearest clean interval and tell the user what you rounded to before scheduling.

## Action

1. Call CronCreate with:
   - `cron`: the expression from the table above
   - `prompt`: the parsed prompt from above, verbatim (slash commands are passed through unchanged)
   - `recurring`: `true`
2. Briefly confirm: what's scheduled, the cron expression, the human-readable cadence, that recurring tasks auto-expire after 7 days, and that they can cancel sooner with CronDelete (include the job ID).
3. **Then immediately execute the parsed prompt now** — don't wait for the first cron fire. If it's a slash command, invoke it via the Skill tool; otherwise act on it directly.

## Input

30m I am sleeping and this is an automated loop, if you have stopped working,  you should continue with implementation unless everything that we previously discussed is done. If you are still working on things, ignore this message.


[Request interrupted by user]


<task-notification>
<task-id>b1t3a9w4v</task-id>
<tool-use-id>toolu_01UAaNkqZvWAZF2Qs8oLBR56</tool-use-id>
<output-file>/tmp/claude-0/-root-traccar-geocoder/af1c4baa-0f9a-4420-a8b3-ce20dc28c8b9/tasks/b1t3a9w4v.output</output-file>
<status>completed</status>
<summary>Background command "Planet patch with streaming pipeline" completed (exit code 0)</summary>
</task-notification>
Read the output file to retrieve the result: /tmp/claude-0/-root-traccar-geocoder/af1c4baa-0f9a-4420-a8b3-ce20dc28c8b9/tasks/b1t3a9w4v.output


<task-notification>
<task-id>bavf108a8</task-id>
<tool-use-id>toolu_01FyZJS9rwiPukEBgfYU868k</tool-use-id>
<output-file>/tmp/claude-0/-root-traccar-geocoder/af1c4baa-0f9a-4420-a8b3-ce20dc28c8b9/tasks/bavf108a8.output</output-file>
<status>completed</status>
<summary>Background command "Start planet patch with reusable buffer" completed (exit code 0)</summary>
</task-notification>
Read the output file to retrieve the result: /tmp/claude-0/-root-traccar-geocoder/af1c4baa-0f9a-4420-a8b3-ce20dc28c8b9/tasks/bavf108a8.output


I'm continuing with the low-memory patch tool redesign. Target: <500 MiB peak RSS. Let me start implementing.

The key architectural changes:
1. **mmap all old files** instead of `read_file()` — zero copy
2. **fwrite output directly to files** instead of accumulating in vectors
3. **Process entry types one at a time** — free each remap vector after use
4. **Stream merge replays** — write output chunks directly to file

Let me rewrite the patch tool from scratch with these principles:


     1→// geocoder-patch v3: Apply custom patch format.
     2→//
     3→// Decompresses zstd transport layer, then:
     4→// 1. Reads string remap, applies to old data files
     5→// 2. Replays merge sequences to reconstruct new data files
     6→// 3. Writes full-replacement entry/cell files
     7→//
     8→// Usage: geocoder-patch <current-dir> <patch-file> -o <output-dir>
     9→
    10→#include <cstdint>
    11→#include <cstdlib>
    12→#include <cstring>
    13→#include <ctime>
    14→#include <fcntl.h>
    15→#include <malloc.h>
    16→#include <fstream>
    17→#include <iomanip>
    18→#include <iostream>
    19→#include <mutex>
    20→#include <string>
    21→#include <sys/mman.h>
    22→#include <sys/stat.h>
    23→#include <thread>
    24→#include <unordered_map>
    25→#include <unistd.h>
    26→#include <vector>
    27→
    28→static double now_ms() {
    29→    struct timespec ts; clock_gettime(CLOCK_MONOTONIC, &ts);
    30→    return ts.tv_sec * 1000.0 + ts.tv_nsec / 1e6;
    31→}
    32→static size_t get_rss_mb() {
    33→    std::ifstream f("/proc/self/statm");
    34→    size_t pages = 0; f >> pages; // first field is total pages, second is RSS
    35→    f >> pages; // RSS in pages
    36→    return pages * 4096 / (1024*1024);
    37→}
    38→static void log_phase(const char* label, double start) {
    39→    std::cerr << "  [" << std::fixed << std::setprecision(1) << (now_ms() - start) / 1000.0
    40→              << "s, " << get_rss_mb() << " MiB] " << label << std::endl;
    41→}
    42→
    43→#include "patch_format.h"
    44→
    45→// Merge ops (must match diff tool)
    46→enum MergeOp : uint8_t { OP_MATCH_RUN = 0, OP_INSERT_RUN = 1, OP_DELETE_RUN = 2 };
    47→
    48→int main(int argc, char* argv[]) {
    49→    if (argc < 5 || std::string(argv[3]) != "-o") {
    50→        std::cerr << "Usage: geocoder-patch <current-dir> <patch-file> -o <output-dir>" << std::endl;

// geocoder-patch v3: Apply custom patch format.
//
// Decompresses zstd transport layer, then:
// 1. Reads string remap, applies to old data files
// 2. Replays merge sequences to reconstruct new data files
// 3. Writes full-replacement entry/cell files
//
// Usage: geocoder-patch <current-dir> <patch-file> -o <output-dir>

#include <cstdint>
#include <cstdlib>
#include <cstring>
#include <ctime>
#include <fcntl.h>
#include <malloc.h>
#include <fstream>
#include <iomanip>
#include <iostream>
#include <mutex>
#include <string>
#include <sys/mman.h>
#include <sys/stat.h>
#include <thread>
#include <unordered_map>
#include <unistd.h>
#include <vector>

static double now_ms() {
    struct timespec ts; clock_gettime(CLOCK_MONOTONIC, &ts);
    return ts.tv_sec * 1000.0 + ts.tv_nsec / 1e6;
}
static size_t get_rss_mb() {
    std::ifstream f("/proc/self/statm");
    size_t pages = 0; f >> pages; // first field is total pages, second is RSS
    f >> pages; // RSS in pages
    return pages * 4096 / (1024*1024);
}
static void log_phase(const char* label, double start) {
    std::cerr << "  [" << std::fixed << std::setprecision(1) << (now_ms() - start) / 1000.0
              << "s, " << get_rss_mb() << " MiB] " << label << std::endl;
}

#include "patch_format.h"

// Merge ops (must match diff tool)
enum MergeOp : uint8_t { OP_MATCH_RUN = 0, OP_INSERT_RUN = 1, OP_DELETE_RUN = 2 };

int main(int argc, char* argv[]) {
    if (argc < 5 || std::string(argv[3]) != "-o") {
        std::cerr << "Usage: geocoder-patch <current-dir> <patch-file> -o <output-dir>" << std::endl;


I need to do a complete rewrite of the main function. Let me write the new version:


Error: File content (11263 tokens) exceeds maximum allowed tokens (10000). Use offset and limit parameters to read specific portions of the file, or search for specific content instead of reading the whole file.