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fix(perf): cache this.exclude.shouldInstrument for improved performance #388

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merged 4 commits into from
Apr 20, 2022
+45 −27
Merged

fix(perf): cache this.exclude.shouldInstrument for improved performance #388

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01cad5f
perf: cache this.exclude.shouldInstrument
sapphi-red Apr 6, 2022
4374799
Merge branch 'main' into perf/exclude-cache
bcoe Apr 20, 2022
49c0d73
chore: update node10 snapshot
sapphi-red Apr 20, 2022
a594267
Merge branch 'main' into perf/exclude-cache
bcoe Apr 20, 2022
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22 changes: 20 additions & 2 deletions lib/report.js
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Original file line number Diff line number Diff line change
Expand Up @@ -44,6 +44,7 @@ class Report {
excludeNodeModules: excludeNodeModules
})
this.excludeAfterRemap = excludeAfterRemap
this.shouldInstrumentCache = new Map()
this.omitRelative = omitRelative
this.sourceMapCache = {}
this.wrapperLength = wrapperLength
Expand Down Expand Up @@ -96,7 +97,7 @@ class Report {
const path = resolve(this.resolve, v8ScriptCov.url)
const converter = v8toIstanbul(path, this.wrapperLength, sources, (path) => {
if (this.excludeAfterRemap) {
return !this.exclude.shouldInstrument(path)
return !this._shouldInstrument(path)
}
})
await converter.load()
Expand Down Expand Up @@ -287,7 +288,7 @@ class Report {
}
}
if ((!this.omitRelative || isAbsolute(v8ScriptCov.url))) {
if (this.excludeAfterRemap || this.exclude.shouldInstrument(v8ScriptCov.url)) {
if (this.excludeAfterRemap || this._shouldInstrument(v8ScriptCov.url)) {
result.push(v8ScriptCov)
}
}
Expand All @@ -311,6 +312,23 @@ class Report {
}
return cache
}

/**
* this.exclude.shouldInstrument with cache
*
* @private
* @return {boolean}
*/
_shouldInstrument (filename) {
const cacheResult = this.shouldInstrumentCache.get(filename)
if (cacheResult !== undefined) {
return cacheResult
}

const result = this.exclude.shouldInstrument(filename)
this.shouldInstrumentCache.set(filename, result)
return result
}
}

module.exports = function (opts) {
Expand Down