Optimized querySelector(All) when selector contains #id.

PerformanceTests/Parser/query-selector-id-deep.html

Index: PerformanceTests/Parser/query-selector-id-deep.html
diff --git a/PerformanceTests/Parser/query-selector-deep.html b/PerformanceTests/Parser/query-selector-id-deep.html
similarity index 77%
copy from PerformanceTests/Parser/query-selector-deep.html
copy to PerformanceTests/Parser/query-selector-id-deep.html
index 605355f53762e40f7cd16e0cbc9b9d9de51b6c9b..3b9fc1aa75ab8732f238dac65af46c8e8fdd17d7 100644
--- a/PerformanceTests/Parser/query-selector-deep.html
+++ b/PerformanceTests/Parser/query-selector-id-deep.html
@@ -18,12 +18,10 @@ h1.className = "class";
 parentDiv.appendChild(h1);
 
 PerfTestRunner.measureRunsPerSecond({
-    description: "This benchmark tests querySelector() for an element that appears in the depths in the document",
+    description: "This benchmark tests querySelector() for an element that appears in the depths in the document, and is a descendant of an element with a given id",
     run: function() {
         for (var i = 0; i < 100; i++) {
-            document.querySelector("h1");
-            document.querySelector("#id");
-            document.querySelector(".class");
+            var res = document.querySelector("#foo998 h1");

[haraken, 2013/05/14 00:32:58]

Instead of modifying existing perf tests, I'd prefer adding a new perf test for
this change.

         }
     }});
 </script>