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How to speed up the Rust compiler in September 2026

Nicholas Nethercote has published a new installment of his recurring guide to improving the performance of the Rust compiler, rustc. The post walks through practical contributions from September 2026, profiling work, and the techniques that have yielded speedups. It continues his long-running series, which developers and Rust project contributors follow for guidance on how to start optimizing the compiler themselves.

Why now: The Rust compiler's performance is a recurring concern for the community, and the author's hands-on guides attract attention from developers interested in contributing optimizations.

Nicholas NethercoteRustrustc

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