From 782239b6b14d6827e9098eb3c3d9bfb8d6c254d4 Mon Sep 17 00:00:00 2001
From: Cyrus Najmabadi <cyrusn@microsoft.com>
Date: Wed, 29 Oct 2014 14:18:29 -0700
Subject: [PATCH] use .pop() on an array instead of setting the length
 directly.  The latter causes v8 to stop optimizing the method.

---
 src/services/syntax/scanner.ts | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/services/syntax/scanner.ts b/src/services/syntax/scanner.ts
index 29ced029f1c..a30b8b7d4b2 100644
--- a/src/services/syntax/scanner.ts
+++ b/src/services/syntax/scanner.ts
@@ -1628,13 +1628,12 @@ module TypeScript.Scanner {
                 var diagnostic = _tokenDiagnostics[tokenDiagnosticsLength - 1];
                 if (diagnostic.start() >= position) {
                     tokenDiagnosticsLength--;
+                    _tokenDiagnostics.pop();
                 }
                 else {
                     break;
                 }
             }
-
-            _tokenDiagnostics.length = tokenDiagnosticsLength;
         }
 
         function resetToPosition(absolutePosition: number): void {