GoKawiilRust compiler sees 4.57% mean speedup in latest two-month performance report
A new Rust compiler performance report covering July 29 to September 28, 2026 shows a mean wall-time reduction of 4.57% across 629 benchmark measurements, with 555 improving and only 74 regressing. Key contributors included PGO enablement for Clippy (up to 18% faster in some cases), an upgrade to LLVM 23 that cut mean wall-time by 1.2%, and optimizations to the new Polonius Alpha borrow checker that reduced instruction counts for crates like serde by 3-5%.