Stacktrace optimization for getModified time in anticipation of using…

… it more than fileExists wherever possible
microsoft · Apr 19, 2022 · 16cef4a · 16cef4a
1 parent 87a7112
commit 16cef4a
Showing 1 changed file with 7 additions and 0 deletions.
diff --git a/src/compiler/sys.ts b/src/compiler/sys.ts
@@ -1859,12 +1859,19 @@ namespace ts {
             }
 
             function getModifiedTime(path: string) {
+                // 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 {
                     return statSync(path)?.mtime;
                 }
                 catch (e) {
                     return undefined;
                 }
+                finally {
+                    Error.stackTraceLimit = originalStackTraceLimit;
+                }
             }
 
             function setModifiedTime(path: string, time: Date) {