perf: Use a memoized key lookup for rules #615
+100
−37
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@amilajack, could you rerun the workflow for this branch? I believe the earlier test failures were due to issues that had already been fixed in the main branch. |
On my project, this makes ESLint as a whole roughly 8% faster, and it seems to result in consistently faster benchmarks. Note a behavior change - member expressions used to find the first matching rule, while they now favor the more general rule if relevant. (I believe this change is an improvement: "Promise is not supported in IE 10" is a more helpful message than "Promise.reject() is not supported in IE 10".)
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On my project, this makes ESLint as a whole roughly 8% faster, and it seems to result in consistently faster benchmarks.
Note a behavior change - member expressions used to find the first matching rule, while they now favor the more general rule if relevant. (I believe this change is an improvement: "Promise is not supported in IE 10" is a more helpful message than "Promise.reject() is not supported in IE 10".)