Moe Charm (CI)
b7e01a9419
Phase 14 v2: Hot Path Integration NEUTRAL (+0.08% Mixed, -0.39% C7-only)
Implementation:
- Patch 1: Add tcache pop to tiny_hot_alloc_fast() (try tcache first)
- Patch 2: Add tcache push to tiny_hot_free_fast() (try tcache first)
- Makefile fix: Add missing .o files to BENCH_HAKMEM_OBJS_BASE
- LTO fix: Restore static inline for tiny_c7_preserve_header_enabled()
A/B Test Results:
- Mixed (16-1024B): 51,287,515 → 51,330,213 ops/s (+0.08%)
- C7-only (1025-2048B): 80,975,651 → 80,660,283 ops/s (-0.39%)
Verdict: NEUTRAL (below +1.0% GO threshold)
Root Cause:
- LIFO/FIFO mixing degrades cache locality
- Hot path branch overhead
- Intrusive pointers add overhead vs array cache
- v2 worse than v1 (+0.20%)
Files:
- Modified: core/box/tiny_front_hot_box.h (tcache integration)
- Modified: Makefile (BENCH_HAKMEM_OBJS_BASE fix)
- Modified: core/box/tiny_c7_preserve_header_env_box.{h,c} (LTO fix)
- Results: docs/analysis/PHASE14_POINTER_CHASE_REDUCTION_2_AB_TEST_RESULTS.md
Decision: Freeze Phase 14 (v1+v2) as research box (HAKMEM_TINY_TCACHE=0 default)
Next: Phase 15 (UnifiedCache FIFO→LIFO) - optimize array cache structure
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
2025-12-15 01:57:38 +09:00
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