Cli tool to compare commits locally
Nadrieril opened this issue · comments
Hi! I tend to work on performance-sensitive parts of the compiler so I check performance locally a lot. In the current setup this requires me to run a docker script and check a website page. It would make my life much easier if I could run say rustc-perf compare <commita> <commitb> instructions:u and get out the little table of relevant benchmark diffs. Would that be easy to implement?
Hi, you don't really have to run Docker, you can either just build the website locally (using npm run watch && cargo build -p site) or you can download a precompiled binary with the website (https://github.com/rust-lang/rustc-perf/releases).
That being said, a basic CLI output wouldn't be a bad idea, we already have it for runtime benchmarks.
It should be relatively easy to implement, either by modifying the behavior of bench_local, and adding output of the measured results, or by introducing a separate new command for this. The collector code was heavily refactored and running benchmarks from it in a new command should hopefully be relatively easy.