Rust compiler gets 4.57% faster in two months, with 555 benchmarks improving
How to speed up the Rust compiler in September 2026
Rust compiler performance improved by 4.57% in mean wall-time between July and September 2026, with 555 of 629 benchmarks showing gains. Key contributors include PGO for Clippy, LLVM 23, and optimizations to the new borrow checker and trait solver. The author also highlights a dataflow analysis change that cut compile time by 30% on a large crate. He will join Hexcat to work on compiler performance.
The mean wall-time reduction was 4.57%, which is a remarkable improvement in just two months. Of the 629 benchmark measurements, 555 of them improved and only 74 regressed.