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Set stackTraceLimit to 0 in fileSystemEntryExists#40444

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Merged
Andrew Casey (amcasey) merged 1 commit into from
Sep 16, 2020
Merged

Set stackTraceLimit to 0 in fileSystemEntryExists #40444

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8 changes: 8 additions & 0 deletions src/compiler/sys.ts
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Original file line numberDiff line numberDiff line change
Expand Up@@ -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) {
Expand All@@ -1673,6 +1678,9 @@ namespace ts {
catch (e) {
return false;
}
finally {
Error.stackTraceLimit = originalStackTraceLimit;
}
}

function fileExists(path: string): boolean {
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