How to speed up the Rust compiler in September 2026
A Rust compiler update reports a 4.57% mean wall-time reduction over two months.
A Rust compiler performance note covering 29 July to 28 September 2026 reports a 4.57% mean wall-time reduction, with 555 of 629 benchmarks improving. Cited work includes Clippy PGO, an LLVM 23 upgrade, Polonius Alpha, a new trait solver, and dataflow changes that cut cranelift-codegen check time by about 30%. The author says LLMs assisted analysis but that all code and text were written by hand. This is compiler engineering, not a cybersecurity or AI-security event.
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- rustc
- Organizations
- Rust Project
From the original article
5 min read at nnethercote.github.ioon the Rust compiler’s performance was two months ago and a lot has happened The measurements for the period 2026-07-29 to 2026-09-28 can be seen The mean wall-time reduction was 4. 57%, which is a remarkable improvement in
By trickypr · nnethercote.github.io
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