erikcorry: Remember to put objects back in fast case after adding functions....

src/v8natives.js

 // Copyright 2006-2008 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 439 matching lines @@
 
 
 function NumberToJSON(key) {
   return CheckJSONPrimitive(this.valueOf());
 }
 
 
 // ----------------------------------------------------------------------------
 
 function SetupNumber() {
+  %OptimizeObjectForAddingMultipleProperties($Number.prototype, 8);
   // Setup the constructor property on the Number prototype object.
-  %OptimizeObjectForAddingMultipleProperties($Number.prototype, 8);
   %SetProperty($Number.prototype, "constructor", $Number, DONT_ENUM);
 
   %OptimizeObjectForAddingMultipleProperties($Number, 5);
   // ECMA-262 section 15.7.3.1.
   %SetProperty($Number,
                "MAX_VALUE",
                1.7976931348623157e+308,
                DONT_ENUM | DONT_DELETE | READ_ONLY);
 
   // ECMA-262 section 15.7.3.2.
   %SetProperty($Number, "MIN_VALUE", 5e-324, DONT_ENUM | DONT_DELETE | READ_ONLY);
 
   // ECMA-262 section 15.7.3.3.
   %SetProperty($Number, "NaN", $NaN, DONT_ENUM | DONT_DELETE | READ_ONLY);
 
   // ECMA-262 section 15.7.3.4.
   %SetProperty($Number,
                "NEGATIVE_INFINITY",
                -1/0,
                DONT_ENUM | DONT_DELETE | READ_ONLY);
 
   // ECMA-262 section 15.7.3.5.
   %SetProperty($Number,
                "POSITIVE_INFINITY",
                1/0,
                DONT_ENUM | DONT_DELETE | READ_ONLY);
+  %TransformToFastProperties($Number);
 
   // Setup non-enumerable functions on the Number prototype object.
   InstallFunctions($Number.prototype, DONT_ENUM, $Array(
     "toString", NumberToString,
     "toLocaleString", NumberToLocaleString,
     "valueOf", NumberValueOf,
     "toFixed", NumberToFixed,
     "toExponential", NumberToExponential,
     "toPrecision", NumberToPrecision,
     "toJSON", NumberToJSON
@@ skipping 70 matching lines @@
 
 // ----------------------------------------------------------------------------
 
 function SetupFunction() {
   InstallFunctions($Function.prototype, DONT_ENUM, $Array(
     "toString", FunctionToString
   ));
 }
 
 SetupFunction();