bf9384a1d58d8df196c31ce0b1178c65d9aa3550
Bet A: the per-sample lookup it would remove is 5.1-6.1% exclusive, and feature-major visiting would touch 5.2-6.6x more lattice points than the current code evaluates; the swept kernel is branch-divergent. Killed on its own numbers. Bet B: 20.04% of static LOD0 density calls are exact duplicates with 80.6% donors already finished (~2.96 s of 18.3 s), moving 20.70% / 63.3%; re-derived independently from the raw trace. Its rung-2 prototype is committed unvalidated on sol/tile-sample-reuse after the Codex usage limit ended the round mid-rebuild; resume brief in the scratchpad. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01TaFdXhTdYMkW1xrV6ApT6Y
measure(perf): the remaining 4.3x is ALL density evaluation -- and the classifier costs 3.5x in game
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