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fix(rolldown): match unnamed chunks across compared sessions #614

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Merged
webfansplz merged 1 commit into from
Oct 20, 2026
Merged

fix(rolldown): match unnamed chunks across compared sessions #614

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6 changes: 4 additions & 2 deletions packages/rolldown/src/node/rpc/functions/rolldown-get-session-compare-details.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -137,11 +137,13 @@ function getChunkSize(reader: RolldownEventsReader, chunk: RolldownChunkInfo | u
}

function getChunkKey(chunk: RolldownChunkInfo) {
if (chunk.name)
// Bracketed names are guessed (`[<first module>_<module count>]`) and change whenever
// a module is added or removed, so match those chunks by entry or first module instead
if (chunk.name && !/^\[.*\]$/.test(chunk.name))
return `name:${chunk.name}`
if (chunk.entry_module)
return `entry:${chunk.entry_module}`
return `modules:${chunk.modules.toSorted((a, b) => a.localeCompare(b)).join('\0')}`
return `module:${chunk.modules[0] ?? chunk.chunk_id}`
}

function getPackageImporters(pkg: { files: PackageInfo['files'] } | undefined) {
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