uv Author Uses Codex to Optimize Tokio I/O, ~80% Faster

Charlie Marsh, creator of ruff/uv, applied the rule of batching I/O into a single blocking Tokio task using Codex, achieving roughly 80% speedups in list-threads workflows and major gains across other common tasks.

2026-10-07 ~ 2026-10-07 · 2 related posts

• Batching I/O in One Blocking Tokio Task Makes Codex ~80% Faster at Listing Threads — charliermarsh · 2026-10-07
• uv creator sped up thread listing ~80% by having Codex apply Tokio batch-I/O rules — charliermarsh · 2026-10-07