Worms round (Codex; reviewed by me against its report and PERF-SAMPLED.md).
Part 1, a real off switch: UVoxelStrateDefinition::bEnableWorms (default true, so existing assets
are unchanged). It is deliberately not in FStrateGenerationParams, so the 83-field memo-key guard
is untouched. It resolves after composer candidates, season vectors and boundary blending, is
included in the generation fingerprint, and clamps composer overrides, so a roll cannot re-enable
it. With strength 0 the fused path skips the worm block, the op-stack builder omits the worm
source, and the interval/classifier paths do no worm work. Proof: disabled == hand-zeroed control
byte for byte (70D310A4, 74,672 triangles), capability 20,856 / 10,917, connected, zero worm rows
in the symbolised sampler. voxel.WormsForceOff is a dev-only, world-changing measurement
override, included in the fingerprint.
Part 0: the sampler writes a module map (733 modules, identity checked), and a post-exit
offline symboliser (VoxelStackOfflineSymbolizer, editor module) rebuilds the all-LOD / LOD0 /
LOD1+ exclusive / inclusive / source-line tables. A planted cost was found (5 named rows) and then
removed. DbgHelp still never runs in the measured process.
Part 2, "cheap worms": FAILED to deliver, and the default is wrong. No candidate was faster:
lattice-2/4 gave no gain, and value noise was within noise static and ~2.1% WORSE in moving worker
seconds. Yet this commit carries voxel.WormNoiseMode=1 (value noise) as the default, a field change
(29/64 test tiles) with no benefit, selected after value-noise variants were tried until one
passed capability (three were rejected at 20,821-20,828). The next round reverts the default to
exact Perlin (mode 0) and removes the no-gain world-changing experiment modes.
The finding that matters: disabling worms entirely (WormsForceOff A/B, two interleaved runs each)
saves only ~2.5% static and ~3.4% moving worker time. The sampler's "worm line
VoxelGenerator.cpp:3985 = 19.4% of LOD0" was a misattribution of inlined noise code to one PDB
line. Line-level attribution of inlined code must be confirmed by ablation before a round targets
it. That is why the worm block skip (26b3476) found nothing.
Runs: the full ledger is in PERF-SAMPLED.md. Failures: one moving wrapper hit the graceful-close
timeout and was rerun; the first offline-symboliser commandlet hit the DDC no-writable-nodes fatal
(crash folder UECC-...CE75ACD5, 08:01) and was retried with the writable Saved\DDC.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01TaFdXhTdYMkW1xrV6ApT6Y
Fr0zkaandClaude Opus 5
c132243b30