Add a performance test showing that List is not as efficient as std::vector.

src/utils.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 12 matching lines @@
 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #ifndef V8_UTILS_H_
 #define V8_UTILS_H_
 
 #include <stdlib.h>
 #include <string.h>
+#include <algorithm>
 #include <climits>
 
 #include "allocation.h"
 #include "checks.h"
 #include "globals.h"
 
 namespace v8 {
 namespace internal {
 
 // ----------------------------------------------------------------------------
@@ skipping 367 matching lines @@
   }
 
   void Sort(int (*cmp)(const T*, const T*)) {
     typedef int (*RawComparer)(const void*, const void*);
     qsort(start(),
           length(),
           sizeof(T),
           reinterpret_cast<RawComparer>(cmp));
   }
 
+  void SortBetter() {
+    std::sort(start(), start() + length());
+  }
+
   void Sort() {
     Sort(PointerValueCompare<T>);
   }
 
   void Truncate(int length) {
     ASSERT(length <= length_);
     length_ = length;
   }
 
   // Releases the array underlying this vector. Once disposed the
@@ skipping 653 matching lines @@
 
   // Every compiled stub starts with this id.
   static const int kStubEntryId = 5;
 
   int id_;
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_UTILS_H_