perf(copy): avoid regex in isTypedArray

Closes: angular#12054

Author: jbedard

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));
 }