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Phase 35-A: BENCH_MINIMAL gate function elimination (GO +4.39%) - tiny_front_v3_enabled() → constant true - tiny_metadata_cache_enabled() → constant 0 - learner_v7_enabled() → constant false - small_learner_v2_enabled() → constant false Phase 36: Policy snapshot init-once (GO +0.71%) - small_policy_v7_snapshot() version check skip in BENCH_MINIMAL - TLS cache for policy snapshot Phase 37: Standard TLS cache (NO-GO -0.07%) - TLS cache for Standard build attempted - Runtime gate overhead negates benefit Phase 38: FAST/OBSERVE/Standard workflow established - make perf_fast, make perf_observe targets - Scorecard and documentation updates Phase 39: Hot path gate constantization (GO +1.98%) - front_gate_unified_enabled() → constant 1 - alloc_dualhot_enabled() → constant 0 - g_bench_fast_front, g_v3_enabled blocks → compile-out - free_dispatch_stats_enabled() → constant false Results: - FAST v3: 56.04M ops/s (47.4% of mimalloc) - Standard: 53.50M ops/s (45.3% of mimalloc) - M1 target (50%): 5.5% remaining 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Archive Directory
This directory contains historical documents, old benchmark results, and experimental work from the HAKMEM memory allocator project.
Structure
phase2/ - Phase 2 Documentation
Phase 2 modularization work (completed):
- IMPLEMENTATION_ROADMAP.md - Original Phase 2 roadmap
- P0_SUCCESS_REPORT.md - P0 batch refill success report (+5.16% improvement)
- README_PHASE_2C.txt - Phase 2C module extraction notes
- PHASE2_MODULE6_*.txt - Module 6 quick reference and summary
analysis/ - Historical Analysis Reports
Research and analysis documents from various optimization phases:
- RING_SIZE_* (4 files) - Ring buffer size analysis
- 3LAYER_* (2 files) - 3-layer allocation strategy experiments
- COMPARISON files - Performance comparisons
- MT_SAFETY_FINDINGS.txt - Multi-threading safety analysis
- NEXT_STEP_ANALYSIS.md - Strategic planning
- gemini_*.txt (4 files) - AI-assisted code reviews
old_benches/ - Historical Benchmark Results
Benchmark results from earlier phases:
- bench_phase*.txt - Phase milestone benchmarks
- bench_step*.txt - Step-by-step optimization results
- bench_reserve*.txt - Reserve pool experiments
- bench_*_results.txt - Various benchmark runs
old_logs/ - Debug and Test Logs
Debug logs, test outputs, and build logs:
- debug_*.log - Debug session logs
- test_*.log - Test execution logs
- obs_*.log - Observation/profiling logs
- build_pgo*.log - PGO build logs
- phase*.log - Phase-specific logs
experimental_scripts/ - Experimental Scripts
Scripts from A/B testing and parameter sweeps:
- ab_*.sh - A/B testing scripts
- sweep_*.sh - Parameter sweep scripts
- prof_sweep.sh - Profile sweeping
- reorg_plan_a.sh - Reorganization experiments
Timeline
- Phase 1: Initial implementation
- Phase 2: Modularization (Module 1-6)
- Module 2: Ring buffer optimization
- Module 6: L2 pool extraction
- P0: Batch refill (+5.16%)
- Phase 3: Mid Range MT allocator (current)
- Goal: 100-120M ops/sec
- Result: 110M ops/sec (achieved!)
Restoration
All files in this archive can be restored to the root directory if needed:
# Restore Phase 2 docs
cp archive/phase2/*.md .
# Restore specific analysis
cp archive/analysis/RING_SIZE_INDEX.md .
# Restore benchmark results
cp archive/old_benches/bench_phase1_results.txt .
See Also
CLEANUP_SUMMARY_2025_11_01.md- Detailed cleanup reportbench_results/- Current benchmark resultsperf_data/- Performance profiling data
Archived: 2025-11-01 Total: 71 files preserved