Improving Rust Compiler Performance: Recent Updates and Optimizations

2023/08/25

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The article showcases recent updates and optimizations made to the Rust compiler to improve its performance. The author highlights several significant improvements, including the implementation of a faster hashing algorithm for incremental compilation, resulting in a mean wall-time reduction of 1.63%. Additionally, the upgrade to LLVM 16 contributed to a mean wall-time reduction of 1.19%, and the subsequent upgrade to LLVM 17 resulted in a 1.91% improvement. The author also mentions the optimization of lint execution, which led to a mean wall-time reduction of 1.05%. The article further discusses the efforts to improve parallelization in the Rust compiler's back-end, with notable wins in reducing peak memory usage and binary sizes. Overall, these updates and optimizations aim to enhance the performance and efficiency of the Rust compiler, providing developers with faster compilation times and improved code generation.