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89a9212700
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Phase 83-1 + Allocator Comparison: Switch dispatch fixed (NO-GO +0.32%), PROFILE correction, SCORECARD update
Key changes:
- Phase 83-1: Switch dispatch fixed mode (tiny_inline_slots_switch_dispatch_fixed_box) - NO-GO (marginal +0.32%, branch reduction negligible)
Reason: lazy-init pattern already optimal, Phase 78-1 pattern shows diminishing returns
- Allocator comparison baseline update (10-run SSOT, WS=400, ITERS=20M):
tcmalloc: 115.26M (92.33% of mimalloc)
jemalloc: 97.39M (77.96% of mimalloc)
system: 85.20M (68.24% of mimalloc)
mimalloc: 124.82M (baseline)
- hakmem PROFILE correction: scripts/run_mixed_10_cleanenv.sh + run_allocator_quick_matrix.sh
PROFILE explicitly set to MIXED_TINYV3_C7_SAFE for hakmem measurements
Result: baseline stabilized to 55.53M (44.46% of mimalloc)
Previous unstable measurement (35.57M) was due to profile leak
- Documentation:
* PERFORMANCE_TARGETS_SCORECARD.md: Reference allocators + M1/M2 milestone status
* PHASE83_1_SWITCH_DISPATCH_FIXED_RESULTS.md: Phase 83-1 analysis (NO-GO)
* ALLOCATOR_COMPARISON_QUICK_RUNBOOK.md: Quick comparison procedure
* ALLOCATOR_COMPARISON_SSOT.md: Detailed SSOT methodology
- M2 milestone status: 44.46% (target 55%, gap -10.54pp) - structural improvements needed
🤖 Generated with Claude Code
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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2025-12-18 18:50:00 +09:00 |
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043d34ad5a
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Phase 75-2: C5-only Inline Slots (P2) - GO (+1.10%)
Extends Phase 75-1 pattern to C5 class (28.5% of C4-C7 ops):
- Created 4 new boxes: env_box, tls_box, fast_path_api, TLS variable
- Integration: 2 minimal boundary points (alloc/free for C5)
- Test strategy: C5-only isolation (baseline C5=OFF+C6=ON, treatment C5=ON+C6=ON)
- Default OFF: zero overhead when disabled
Results (10-run Mixed SSOT, WS=400, C6 already enabled):
- Baseline (C5=OFF, C6=ON): 44.26 M ops/s (σ=0.37)
- Treatment (C5=ON, C6=ON): 44.74 M ops/s (σ=0.54)
- Delta: +0.49 M ops/s (+1.10%)
Status: ✅ GO - C5 individual contribution confirmed
Cumulative since Phase 75-0: +2.87% (C6) + 1.10% (C5) = potential +3.97% combined
Next: Phase 75-3 (test C5+C6 interaction + non-additivity + promote to preset default)
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
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2025-12-18 08:39:48 +09:00 |
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