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Phase 68: PGO training set diversification (seed/WS expansion)
Changes:
- scripts/box/pgo_fast_profile_config.sh: Expanded WS patterns (3→5) and seeds (1→3)
for reduced overfitting and better production workload representativeness
- PERFORMANCE_TARGETS_SCORECARD.md: Phase 68 baseline promoted (61.614M = 50.93%)
- CURRENT_TASK.md: Phase 68 marked complete, Phase 67a (layout tax forensics) set Active
Results:
- 10-run verification: +1.19% vs Phase 66 baseline (GO, >+1.0% threshold)
- M1 milestone: 50.93% of mimalloc (target 50%, exceeded by +0.93pp)
- Stability: 10-run mean/median with <2.1% CV
🤖 Generated with Claude Code
Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
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2025-12-17 21:08:17 +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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