QSG_RENDER_TIMING on the F1 build (Mac, NPB Large, ambient off, 3.5 min
of playback) showed the F1 throttle only bought 62 -> ~51 fps, not 30:
the producer publishes at ~30 Hz AND each publish wrote from/to/
progress directly — at()'s only dependencies — so every 33 ms period
invalidated the window TWICE (publish + tick). ~51 fps x ~3.6 ms render
kept the render thread at ~20-25% of a core.
Stage the publish into pendFrom/pendTo (which nothing visual binds to)
and commit + advance in the driver tick: ONE visual write per period.
Pixel-identical output (the bars hold the settled old frame until the
tick, exactly what progress=0 showed), ~30 fps instead of ~51.
Audits green (resolution + singleton xref), build green.
km
vicrodh
f2be1ccee8