bbe0e2b0b5
The headless bake worker renders on SwiftShader (CPU), where per-frame vertex/draw cost dominates the whole capture — but a bake only reads the built scene graph; the pixels are thrown away. `?disable=draw` (same diagnostic-param family as postFx) renders an EMPTY scene each frame instead of the real one: useFrame systems and scene-ready keep ticking, per-frame cost collapses to a 64x64 clear. Rendering nothing at all does NOT work: with zero submitted frames Chromium's no-damage scheduler throttles rAF to exactly 1Hz (measured), starving the very systems the bake needs — hence the empty-scene draw. Measured on the office scene (200+ items) with a real GPU: capture 45.0s -> 8.4s (settle 37.6s -> 4.5s); output equivalent to a normal render (structural GLB diff clean; the ±13-accessor variance exists between normal runs too). CPU-only (worker) numbers via the prod-image container against a preview deploy. Co-authored-by: Claude Fable 5 <noreply@anthropic.com>