Merge pull request #40444 from amcasey/Cherry40043

Set stackTraceLimit to 0 in fileSystemEntryExists
microsoft · Sep 16, 2020 · 23c77c4 · 23c77c4
2 parents 65b84e7 + 657576a
commit 23c77c4
Showing 1 changed file with 8 additions and 0 deletions.
diff --git a/src/compiler/sys.ts b/src/compiler/sys.ts
@@ -1662,6 +1662,11 @@ namespace ts {
             }
 
             function fileSystemEntryExists(path: string, entryKind: FileSystemEntryKind): boolean {
+                // Since the error thrown by fs.statSync isn't used, we can avoid collecting a stack trace to improve
+                // the CPU time performance.
+                const originalStackTraceLimit = Error.stackTraceLimit;
+                Error.stackTraceLimit = 0;
+
                 try {
                     const stat = _fs.statSync(path);
                     switch (entryKind) {
@@ -1673,6 +1678,9 @@ namespace ts {
                 catch (e) {
                     return false;
                 }
+                finally {
+                    Error.stackTraceLimit = originalStackTraceLimit;
+                }
             }
 
             function fileExists(path: string): boolean {