Turns out the answer is no! No measurable change in incremental or cold build.
Charlie Marsh@charliermarsh
You can just run experiments now. Constantly. I was curious if unnecessary Rust derives had any measurable build-time cost. So I had Codex build a tool to identify and remove them, then cut >1500 derives from uv, measured the before and after. All in the background.
9:52 AM · Jun 22, 2026 · 2.3K Views
