> to be able to block merging PRs on changes that accidentally impact LLVM's performance, like is currently the case for rustc. rustc's CI doesn't prevent merg

> to be able to block merging PRs on changes that accidentally impact LLVM's performance, like is currently the case for rustc. rustc's CI doesn't prevent merging PRs that impact performance: while the reviewer can request benchmarks beforehand and choose not to approve the PR if it introduces a regression, all other benchmarks are run after the commits are merged to master.