ea417200d2
Complete planning for Phase 62 based on runtime profiling of Phase 59b baseline. Key Findings (200M ops Mixed benchmark): - tiny_c7_ultra_alloc: 5.18% (new primary target, 5x larger than Phase 61) - tiny_region_id_write_header: 3.82% (reconfirmed, Phase 61 showed 2.32%) - Allocation-specific hot path: 12.37% (C7 + header + cache) Phase 62 Recommendation: Option A (C7 ULTRA Inline + IPC Analysis) - Expected gain: +1-3% (higher absolute margin than Phases 46A/61) - Risk level: Medium (layout tax precedent from Phase 46A -0.68%, Phase 43 -1.18%) - Approach: Deep profiling → ASM inspection → A/B test with ENV gate Alternative Options: - Option B: tiny_region_id_write_header (3.82%, higher risk) - Option C: Algorithmic redesign (post-50% milestone) Box Theory Compliance: - Single conversion point: tiny_c7_ultra_alloc() boundary - Reversible: ENV gate HAKMEM_TINY_C7_ULTRA_INLINE_OPT (0/1) - No side effects: Pure dependency chain reordering Timeline: Single phase, 4-6 hours (profile + ASM + test) Documentation: - PHASE62_NEXT_TARGET_ANALYSIS.md: Complete planning document with profiling data - CURRENT_TASK.md: Updated next phase guidance Profiling tools prepared: - perf record with extended events (cycles, cache-misses, branch-misses) - ASM inspection methodology documented - A/B test threshold: ±0.5% (micro-scale) 🤖 Generated with Claude Code Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
Docs Overview
このフォルダは hakmem の設計・計測・運用メモを体系化して管理する場所です。
- INDEX.md: 目次（各ドキュメントへのリンク）
- benchmarks/: ベンチマーク手順とスイープ結果の保存先
- specs/: 現在の仕様（SACS‑3/HW/ENV）を集約
- roadmap/: これからの実装計画・優先度・タスク
運用ルール（提案）
- 1つの変更/計測のまとまりにつき1ファイル（or 1フォルダ）
- 再現コマンド・環境変数・ハード構成は必ず記載
- 大きな連続出力はファイルへ保存し、本文からは抜粋/要約を記載