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Reduce micromatch overhead in jest-haste-map HasteFS #10132

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Reduce micromatch overhead in jest-haste-map HasteFS #10132

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2 changes: 2 additions & 0 deletions CHANGELOG.md
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Original file line number Diff line number Diff line change
Expand Up @@ -22,6 +22,8 @@

### Performance

- `[jest-haste-map]` Reduce micromatch overhead in jest-haste-map HasteFS

## 26.0.1

### Fixes
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5 changes: 4 additions & 1 deletion packages/jest-haste-map/src/HasteFS.ts
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Expand Up @@ -84,9 +84,12 @@ export default class HasteFS {
root: Config.Path | null,
): Set<Config.Path> {
const files = new Set<string>();

const matchers = globs.map(glob => micromatch.matcher(glob));

for (const file of this.getAbsoluteFileIterator()) {
const filePath = root ? fastPath.relative(root, file) : file;
if (micromatch([replacePathSepForGlob(filePath)], globs).length > 0) {
if (matchers.some(isMatch => isMatch(replacePathSepForGlob(filePath)))) {
files.add(file);
}
}
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