1 files changed, 21 insertions, 3 deletions
diff --git a/deps/v8/src/regexp.js b/deps/v8/src/regexp.js
index 24e3309805..9367f15f91 100644
--- a/deps/v8/src/regexp.js
+++ b/deps/v8/src/regexp.js
@@ -257,6 +257,10 @@ function RegExpExec(string) {
 }
 
 
+// One-element cache for the simplified test regexp.
+var regexp_key;
+var regexp_val;
+
 // Section 15.10.6.3 doesn't actually make sense, but the intention seems to be
 // that test is defined in terms of String.prototype.exec. However, it probably
 // means the original value of String.prototype.exec, which is what everybody
@@ -281,9 +285,7 @@ function RegExpTest(string) {
   }
 
   var lastIndex = this.lastIndex;
-
   var cache = regExpCache;
-
   if (%_ObjectEquals(cache.type, 'test') &&
       %_ObjectEquals(cache.regExp, this) &&
       %_ObjectEquals(cache.subject, string) &&
@@ -291,6 +293,22 @@ function RegExpTest(string) {
     return cache.answer;
   }
 
+  // Remove irrelevant preceeding '.*' in a test regexp. The expression  
+  // checks whether this.source starts with '.*' and that the third 
+  // char is not a '?'
+  if (%_StringCharCodeAt(this.source,0) == 46 && // '.'
+      %_StringCharCodeAt(this.source,1) == 42 && // '*' 
+      %_StringCharCodeAt(this.source,2) != 63) { // '?' 
+    if (!%_ObjectEquals(regexp_key, this)) {
+      regexp_key = this; 
+      regexp_val = new $RegExp(this.source.substring(2, this.source.length),
+                               (this.global ? 'g' : '')
+                               + (this.ignoreCase ? 'i' : '')
+                               + (this.multiline ? 'm' : ''));
+    }
+    if (!regexp_val.test(s)) return false;
+  }
+  
   var length = s.length;
   var i = this.global ? TO_INTEGER(lastIndex) : 0;
 
@@ -299,7 +317,7 @@ function RegExpTest(string) {
   cache.subject = s;
   cache.lastIndex = i;
 
-  if (i < 0 || i > s.length) {
+  if (i < 0 || i > length) {
     this.lastIndex = 0;
     cache.answer = false;
     return false;