> With cloud CI runners you'd still have issues with hardware differences
For my project it really is the diff of each commit, which means that I start from a parent commit that isn’t part of the PR and re-measure that, then for each new commit. This should avoid accounting for changes in hardware as well as things like Rust versions (if those aren’t locked in via rustup).
The rest of your points are valid of course, but this was a good compromise for my OSS project where I don’t wish to spend extra money.
For my project it really is the diff of each commit, which means that I start from a parent commit that isn’t part of the PR and re-measure that, then for each new commit. This should avoid accounting for changes in hardware as well as things like Rust versions (if those aren’t locked in via rustup).
The rest of your points are valid of course, but this was a good compromise for my OSS project where I don’t wish to spend extra money.