A bunch of changes to speed up math on ARM....

src/d8.js

 // Copyright 2008 the V8 project authors. All rights reserved.
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 // met:
 //
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-// How crappy is it that I have to implement completely basic stuff
-// like this myself?  Answer: very.
 String.prototype.startsWith = function (str) {
   if (str.length > this.length)
     return false;
   return this.substr(0, str.length) == str;
 }
 
 function log10(num) {
   return Math.log(num)/Math.log(10);
 }
 
@@ skipping 1439 matching lines @@
       json += NumberToJSON_(elem);
     } else if (typeof(elem) === 'string')  {
       json += StringToJSON_(elem);
     } else {
       json += elem;
     }
   }
   json += ']';
   return json;
 }