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871034da1f
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Phase 9: FREE-TINY-FAST MONO DUALHOT (GO +2.72%)
Results:
- A/B test: +2.72% on Mixed (10-run, clean env)
- Baseline: 48.89M ops/s
- Optimized: 50.22M ops/s
- Improvement: +1.33M ops/s (+2.72%)
- Stability: Standard deviation reduced by 60.8% (2.44M → 955K ops/s)
Strategy:
- Transplant C0-C3 "second hot" path to monolithic free_tiny_fast()
- Early-exit within monolithic (no hot/cold split)
- FastLane free now benefits from C0-C3 direct path
Success factors:
1. Performance improvement: +2.72% (2.7x GO threshold)
2. Stability improvement: 2.6x more stable (stdev 60.8% reduction)
3. Learned from Phase 7 failure:
- Phase 7: Function split (hot/cold) → NO-GO
- Phase 9: Early-exit within monolithic → GO
4. FastLane free compatibility: C0-C3 direct path now works with FastLane
5. Policy snapshot overhead reduction: C0-C3 (48% of Mixed) skip route lookup
Implementation:
- Patch 1: ENV gate box (free_tiny_fast_mono_dualhot_env_box.h)
- ENV: HAKMEM_FREE_TINY_FAST_MONO_DUALHOT=0/1 (default 0)
- Probe window: 64 (avoid bench_profile putenv race)
- Patch 2: Early-exit in free_tiny_fast() (malloc_tiny_fast.h)
- Conditions: class_idx <= 3, !LARSON_FIX, route==LEGACY
- Direct call: tiny_legacy_fallback_free_base()
- Patch 3: Visibility (free_path_stats_box.h)
- mono_dualhot_hit counter (compile-out in release)
- Patch 4: cleanenv extension (run_mixed_10_cleanenv.sh)
- ENV leak protection
Files modified:
- core/bench_profile.h: add to MIXED_TINYV3_C7_SAFE preset
- core/front/malloc_tiny_fast.h: early-exit insertion
- core/box/free_path_stats_box.h: counter
- core/box/free_tiny_fast_mono_dualhot_env_box.h: NEW (ENV gate)
- scripts/run_mixed_10_cleanenv.sh: ENV leak protection
Health check: PASSED (all profiles)
Promotion: Added to MIXED_TINYV3_C7_SAFE preset (default ON, opt-out)
Rollback: HAKMEM_FREE_TINY_FAST_MONO_DUALHOT=0
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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2025-12-14 19:16:49 +09:00 |
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be723ca052
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Phase 8: FREE-STATIC-ROUTE ENV Cache Hardening (GO +2.61%)
Results:
- A/B test: +2.61% on Mixed (10-run, clean env)
- Baseline: 49.26M ops/s
- Optimized: 50.55M ops/s
- Improvement: +1.29M ops/s (+2.61%)
Strategy:
- Fix ENV cache accident (main前キャッシュ事故の修正)
- Add refresh mechanism to sync with bench_profile putenv
- Ensure Phase 3 D1 optimization works reliably
Success factors:
1. Performance improvement: +2.61% (existing win-box now reliable)
2. ENV cache accident fixed: refresh mechanism works correctly
3. Standard deviation improved: 867K → 336K ops/s (61% reduction)
4. Baseline quality improved: existing optimization now guaranteed
Implementation:
- Patch 1: Make ENV gate refreshable (tiny_free_route_cache_env_box.{h,c})
- Changed static int to extern _Atomic int
- Added tiny_free_static_route_refresh_from_env()
- Patch 2: Integrate refresh into bench_profile.h
- Call refresh after bench_setenv_default() group
- Patch 3: Update Makefile for new .c file
ENV cache fix verification:
- [FREE_STATIC_ROUTE] enabled appears twice (refresh working)
- bench_profile putenv now reliably reflected
Files modified:
- core/box/tiny_free_route_cache_env_box.h: extern + refresh API
- core/box/tiny_free_route_cache_env_box.c: NEW (global state + refresh)
- core/bench_profile.h: add refresh call
- Makefile: add new .o file
Health check: PASSED (all profiles)
Rollback: HAKMEM_FREE_STATIC_ROUTE=0 or revert Patch 1/2
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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2025-12-14 18:49:08 +09:00 |
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dcc1d42e7f
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Phase 6-2: Promote Front FastLane Free DeDup (default ON)
Results:
- A/B test: +5.18% on Mixed (10-run, clean env)
- Baseline: 46.68M ops/s
- Optimized: 49.10M ops/s
- Improvement: +2.42M ops/s (+5.18%)
Strategy:
- Eliminate duplicate header validation in front_fastlane_try_free()
- Direct call to free_tiny_fast() when dedup enabled
- Single validation path (no redundant checks)
Success factors:
1. Complete duplicate elimination (free path optimization)
2. Free path importance (50% of Mixed workload)
3. Improved execution stability (CV: 1.00% → 0.58%)
Phase 6 cumulative:
- Phase 6-1 FastLane: +11.13%
- Phase 6-2 Free DeDup: +5.18%
- Total: ~+16-17% from baseline (multiplicative effect)
Promotion:
- Default: HAKMEM_FRONT_FASTLANE_FREE_DEDUP=1 (opt-out)
- Added to MIXED_TINYV3_C7_SAFE preset
- Added to C6_HEAVY_LEGACY_POOLV1 preset
- Rollback: HAKMEM_FRONT_FASTLANE_FREE_DEDUP=0
Files modified:
- core/box/front_fastlane_env_box.h: default 0 → 1
- core/bench_profile.h: added to presets
- CURRENT_TASK.md: Phase 6-2 GO result
Health check: PASSED (all profiles)
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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2025-12-14 17:38:21 +09:00 |
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ea221d057a
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Phase 6: promote Front FastLane (default ON)
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2025-12-14 16:28:23 +09:00 |
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