AnalysisData Engineering · Performance
OpenAI Got 6× Better CPU Efficiency With Rust. The Lesson Is Why They Waited.
OpenAI’s storage service once pushed more than 20 million requests per second through Python. A Rust rewrite later delivered 6× better CPU efficiency and 15× better memory efficiency. The useful engineering lesson is not “rewrite everything in Rust.” It is why OpenAI knowingly carried the slower system first.
Ibrahim Denis Fofanah·Sep 25, 2026·16 min
