[TIMOB-14083] Math.random() needs to be fixed

*Problem* It seems that the generation of random numbers by Math.random() is not performing well. I've done an experiment where I generate random 8-char strings, and then I check the performance on Titanium, node and native iOS, and the results are quite conclusive. Find a detailed description of the experiment here: http://developer.appcelerator.com/question/153040/titanium-performance-generating-random-strings *Test Case* The experiment I did to test this lack of performance was the following: I coded the same random string generator algorithm in javascript and objC. This is how it looks in javascript: function randomId (length) { var textArray = []; var possible = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"; for( var i=0; i < length; i++) textArray.push(possible.charAt(Math.floor(Math.random() * possible.length))); return textArray.join(''); } *Results* And then I perform a test where I generate one million of 8-char strings using this algorithm, I store them in an array, and I check for duplicates. The results are: - When I run it with Titanium (iPhone simulator), I get an average of 40 repeated strings. - When I run it with node (same javascript code), I get NO repeated strings. - When I run it with XCode (the objC version of the algorithm) using the iPhone simulator, I get NO repeated strings. *Conclusion* It seems that there is an important lack of performance of the Math.random() method in the Titanium environment.