perf(copy): avoid regex in isTypedArray

Closes: angular#12054
gkalpak · Nov 23, 2015 · 6190240 · 6190240
1 parent 6cc1446
commit 6190240
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/src/Angular.js b/src/Angular.js
@@ -674,9 +674,9 @@ function isPromiseLike(obj) {
 }
 
 
-var TYPED_ARRAY_REGEXP = /^\[object (Uint8(Clamped)?)|(Uint16)|(Uint32)|(Int8)|(Int16)|(Int32)|(Float(32)|(64))Array\]$/;
+var TYPED_ARRAY_REGEXP = /^\[object (?:Uint8|Uint8Clamped|Uint16|Uint32|Int8|Int16|Int32|Float32|Float64)Array\]$/;
 function isTypedArray(value) {
-  return TYPED_ARRAY_REGEXP.test(toString.call(value));
+  return value && isNumber(value.length) && TYPED_ARRAY_REGEXP.test(toString.call(value));
 }