perf: don't recalculate path.dirname(mod.file) (#15623)

vitejs · Jan 19, 2024 · e459be4 · e459be4
1 parent f08a037
commit e459be4
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/packages/vite/src/node/server/transformRequest.ts b/packages/vite/src/node/server/transformRequest.ts
@@ -327,6 +327,7 @@ async function loadAndTransform(
  )
 
  if (path.isAbsolute(mod.file)) {
+ let modDirname
  for (
  let sourcesIndex = 0;
  sourcesIndex < normalizedMap.sources.length;
@@ -338,8 +339,9 @@ async function loadAndTransform(
  // to resolve and display them in a meaningful way (rather than
  // with absolute paths).
  if (path.isAbsolute(sourcePath)) {
+ modDirname ??= path.dirname(mod.file)
  normalizedMap.sources[sourcesIndex] = path.relative(
- path.dirname(mod.file),
+ modDirname,
  sourcePath,
  )
  }