nodejs
diff --git a/Collapse file
‎benchmark/fixtures/simple-error-stack.js‎
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+11-10Lines changed: 11 additions & 10 deletions b/Collapse file
‎benchmark/fixtures/simple-error-stack.js‎
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+11-10Lines changed: 11 additions & 10 deletions
diff --git a/Collapse file
‎benchmark/fixtures/simple-error-stack.ts‎
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+7-5Lines changed: 7 additions & 5 deletions b/Collapse file
‎benchmark/fixtures/simple-error-stack.ts‎
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+7-5Lines changed: 7 additions & 5 deletions
diff --git a/Collapse file
‎lib/internal/source_map/prepare_stack_trace.js‎
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+8-2Lines changed: 8 additions & 2 deletions b/Collapse file
‎lib/internal/source_map/prepare_stack_trace.js‎
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+8-2Lines changed: 8 additions & 2 deletions
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‎lib/internal/source_map/source_map_cache.js‎
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+5Lines changed: 5 additions & 0 deletions b/Collapse file
‎lib/internal/source_map/source_map_cache.js‎
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+5Lines changed: 5 additions & 0 deletions
@@ -5,11 +5,13 @@
 const lorem = 'Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.';
 
 function simpleErrorStack() {
-  try {
-    (lorem as any).BANG();
-  } catch (e) {
-    return e.stack;
-  }
+  [1].map(() => {
+    try {
+      (lorem as any).BANG();
+    } catch (e) {
+      return e.stack;
+    }
+  })
 }
 
 export {
 
@@ -53,9 +53,15 @@ function prepareStackTraceWithSourceMaps(error, trace) {
       const sm = fileName === lastFileName ?
         lastSourceMap :
         findSourceMap(fileName);
-      lastSourceMap = sm;
-      lastFileName = fileName;
+      // Only when a source map is found, cache it for the next iteration.
+      // This is a performance optimization to avoid interleaving with JS builtin function
+      // invalidating the cache.
+      // - at myFunc (file:///path/to/file.js:1:2)
+      // - at Array.map (<anonymous>)
+      // - at myFunc (file:///path/to/file.js:3:4)
       if (sm) {
+        lastSourceMap = sm;
+        lastFileName = fileName;
         return `${kStackLineAt}${serializeJSStackFrame(sm, callSite, trace[i + 1])}`;
       }
     } catch (err) {
 
@@ -347,6 +347,11 @@ function findSourceMap(sourceURL) {
     return undefined;
   }
 
+  // No source maps for builtin modules.
+  if (sourceURL.startsWith('node:')) {
+    return undefined;
+  }
+
   SourceMap ??= require('internal/source_map/source_map').SourceMap;
   try {
     if (RegExpPrototypeExec(kLeadingProtocol, sourceURL) === null) {