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perf: skip sourcemap generation for renderChunk hook of import-analysis-build plugin #19921

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merged 1 commit into from
Apr 24, 2025
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perf: skip sourcemap generation for renderChunk hook of import-analysis-build plugin #19921

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17 changes: 5 additions & 12 deletions packages/vite/src/node/plugins/importAnalysisBuild.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -403,18 +403,11 @@ export function buildImportAnalysisPlugin(config: ResolvedConfig): Plugin {
if (code.indexOf(isModernFlag) > -1) {
const re = new RegExp(isModernFlag, 'g')
const isModern = String(format === 'es')
if (this.environment.config.build.sourcemap) {
const s = new MagicString(code)
let match: RegExpExecArray | null
while ((match = re.exec(code))) {
s.update(match.index, match.index + isModernFlag.length, isModern)
}
return {
code: s.toString(),
map: s.generateMap({ hires: 'boundary' }),
}
} else {
return code.replace(re, isModern)
const isModernWithPadding =
isModern + ' '.repeat(isModernFlag.length - isModern.length)
return {
code: code.replace(re, isModernWithPadding),
map: null,
}
}
return null
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