19056282b6
Target: Reduce wrapper_env_cfg() overhead in malloc/free hot path - Strategy: Cache wrapper env configuration pointer in TLS - Approach: Fast pointer cache (TLS caches const wrapper_env_cfg_t*) Implementation: - core/box/wrapper_env_cache_env_box.h: ENV gate (HAKMEM_WRAP_ENV_CACHE) - core/box/wrapper_env_cache_box.h: TLS cache layer (wrapper_env_cfg_fast) - core/box/hak_wrappers.inc.h: Integration into malloc/free hot paths - ENV gate: HAKMEM_WRAP_ENV_CACHE=0/1 (default OFF) A/B Test Results (Mixed, 10-run, 20M iters): - Baseline (D2=0): 46.52M ops/s (avg), 46.47M ops/s (median) - Optimized (D2=1): 45.85M ops/s (avg), 45.98M ops/s (median) - Improvement: avg -1.44%, median -1.05% (DECISION: NO-GO) Analysis: - Regression cause: TLS cache adds overhead (branch + TLS access) - wrapper_env_cfg() is already minimal (pointer return after simple check) - Adding TLS caching layer makes it worse, not better - Branch prediction penalty outweighs any potential savings Cumulative Phase 2-3: - B3: +2.89%, B4: +1.47%, C3: +2.20% - D1: +1.06% (opt-in), D2: -1.44% (NO-GO) - Total: ~7.2% (excluding D2) Decision: FREEZE as research box (default OFF, regression confirmed) 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
41 lines
1.6 KiB
Makefile
41 lines
1.6 KiB
Makefile
hakmem_super_registry.o: core/hakmem_super_registry.c \
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core/hakmem_super_registry.h core/hakmem_tiny_superslab.h \
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core/superslab/superslab_types.h core/hakmem_tiny_superslab_constants.h \
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core/superslab/superslab_inline.h core/superslab/superslab_types.h \
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core/superslab/../tiny_box_geometry.h \
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core/superslab/../hakmem_tiny_superslab_constants.h \
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core/superslab/../hakmem_tiny_config.h core/tiny_debug_ring.h \
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core/hakmem_build_flags.h core/tiny_remote.h \
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core/hakmem_tiny_superslab_constants.h core/box/ss_addr_map_box.h \
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core/box/../hakmem_build_flags.h core/box/super_reg_box.h \
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core/box/ss_pt_lookup_box.h core/box/ss_pt_types_box.h \
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core/box/ss_pt_env_box.h core/box/ss_pt_env_box.h \
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core/box/ss_allocation_box.h core/hakmem_tiny_superslab.h \
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core/box/ss_cold_start_box.inc.h core/hakmem_env_cache.h \
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core/box/ss_pt_register_box.h
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core/hakmem_super_registry.h:
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core/hakmem_tiny_superslab.h:
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core/superslab/superslab_types.h:
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core/hakmem_tiny_superslab_constants.h:
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core/superslab/superslab_inline.h:
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core/superslab/superslab_types.h:
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core/superslab/../tiny_box_geometry.h:
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core/superslab/../hakmem_tiny_superslab_constants.h:
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core/superslab/../hakmem_tiny_config.h:
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core/tiny_debug_ring.h:
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core/hakmem_build_flags.h:
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core/tiny_remote.h:
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core/hakmem_tiny_superslab_constants.h:
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core/box/ss_addr_map_box.h:
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core/box/../hakmem_build_flags.h:
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core/box/super_reg_box.h:
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core/box/ss_pt_lookup_box.h:
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core/box/ss_pt_types_box.h:
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core/box/ss_pt_env_box.h:
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core/box/ss_pt_env_box.h:
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core/box/ss_allocation_box.h:
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core/hakmem_tiny_superslab.h:
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core/box/ss_cold_start_box.inc.h:
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core/hakmem_env_cache.h:
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core/box/ss_pt_register_box.h:
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