dhh Ports Rust to x86-64 Assembly with Opus 5.5, Gaining Up to 17x Speedup

dhh used Opus 5.5 to port the ttfx screensaver engine from Rust to x86-64 assembly in one pass, gaining up to 17x performance. A follow-up review showed the real speedup came from SoA layout and redraw optimizations rather than handwritten assembly itself.

2026-09-26 ~ 2026-09-26 · 2 related posts

• dhh: Opus 5.5 one-shot ported Rust screensaver engine to x86-64 asm, 17x faster — zack_overflow · 2026-09-26
• Dev walk-back: the speedup came from SoA design and writev, not AGI-written asm — zack_overflow · 2026-09-26