Follow-up to the headed-llvmpipe switch. That run (28652367347) stopped CRASHING —
every failure became a plain timeout, confirming llvmpipe gives a stable WebGL context
(no more CONTEXT_LOST / "Target crashed") but software raytracing is just slow:
- The first board raytrace takes ~60s on llvmpipe, right at openThreeDViewer's 60s
wait → raise it to 180s (shared helper + the models spec's inline copy). Real GPU
returns in ~2s, so it is only CI headroom.
- The deadlock spec asserts the wasm main thread stays responsive within ~15s DURING a
raytrace — a premise only true on a fast (real) GPU. Under slow software rendering a
legitimately-slow raytrace is indistinguishable from a deadlock, so skip it on CI
(test.skip on process.env.CI). The Worker-boot deadlock MECHANISM stays covered on CI
by the standalone coroutine-pthread-ondemand / raytrace-threads wx harnesses; the spec
still runs locally on a real GPU.
- Gate the headed + llvmpipe launch flags on CI so chromium-ci-3d behaves like a normal
bundled-Chromium project locally.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
d60bc1575b