I wish Zig team did something like this

Not just the general theme of speeding up the compiler

But if you click through those PRs, you can see a batch run of the most common repos, and how much compilation time improved on each

EDIT: it would be also easier to estimate blast radius of any upcoming/drafted Zig lang breaking change

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There was Performance Tracking ⚡ Zig Programming Language but it’s dead for some time now.
IIUC contributions here would be welcome