GetDensityAt asked the strate manager on every sample whether the chunk is a gap chunk, which
generator type it uses, and whether it uses the operator stack. All three are constant per chunk.
voxel.ChunkRoutingCache (default 1) memoises them per worker thread (Codex; reviewed by me):
- thread_local storage only, so no cross-thread sharing;
- key = generator owner id + manager pointer + manager lifetime id + layout version + full chunk
coord, the same identity pattern as the existing CP_* refetch;
- the editor composer override is still queried in the CP_* refetch, not cached here.
Attribution for the re-rank's ~28% shared cost (offline-symbolised sampler, exclusive): GetDensityWithParams
16.4%, GetDensityAt 6.2%, unknown 5.8%, FChunkSDFSpatialIndex::GetRange 3.8%, FScopedTimer::End 1.3%,
VF_ForEachSpatialCandidate 1.2%, UsesOperatorStackForChunk 1.0%. The tunnel-cache lookup was already
near-perfect (48 misses in 2,248,091 samples). A thread-local timer cache was tried and rejected as
slower (+0.4% static, +1.2% moving). Spatial-iteration and mesher-loop changes found no isolated
exact win.
Routing A/B: static worker 28.50 -> 27.78 s (-2.5%), moving 63.01 -> 59.81 s (-5.1%).
Final DEFAULT build vs the committed-tip DLL (two interleaved runs each, same command line):
static worker 28.79 -> 27.58 s (-4.2%) LOD0 p50/p95 52.3/94.8 -> 50.1/92.6 ms
moving worker 62.25 -> 59.97 s (-3.7%) LOD0 p50/p95 51.4/95.8 -> 48.8/92.3 ms
Field exact: OBJ SHA-256 b3e5f4c3..9b377 on both builds, 0 per-tile differences, capability
20,830 / 10,909; TilePostReachProof, sealed-proof and strate-crossing tests pass.
Ledger: every launch was serialized with 0 editors before it. Two attribution attempts were
rejected on harness bookkeeping/output-path bugs before a clean run; one crossing run was invalid
(profiling left on, exit -1) and its retry passed. No crash folders.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01TaFdXhTdYMkW1xrV6ApT6Y
Fr0zkaandClaude Opus 5
410788f7dd