Opus 5.5 took TTFX all the way to assembly: engine up to 22× faster

On Sep 26, 2026, the Omarchy TTFX screensaver engine achieved up to a 22× speedup at peak after work by Opus 5.5. On average, it runs six times faster and outpaces the original Python implementation by up to 450×. Fast paths use SSE2, AVX2 and AVX-512.