Javascript Malloc and Free

There is no byte sized objects in Javascript. Numbers are 64bit floats and characters are 16bit unicode characters. I have been working on a way to give c developers in a javascript world fine grained control over memory usage. Right now I have two seperate implementations of my memory store. One is based on a massive string and is very efficient in size and reading bytes but it alittle slow at setting bytes. The other is based on a array of numbers. This one is not as efficient but much faster for reading and writing memory. Benchmarks show the array based store can allocate a megabyte worth of memory and set each byte to a value in about six seconds.

Here is a example class that is backed by the memory store:

JMM.ASCIIString = Class.extend({
    construct : function (mmu,value){
      this.mem = mmu.malloc(value.length);
      for(n=0;n<value .length;n++)
	  {
	     this.mem.setValue(n,value.charCodeAt(n));
	  }
	},
	toString : function(){
	   str="";
	   for(n=0;n<this.mem.size;n++)
	   {
	       str += String.fromCharCode(this.mem.getValue(n));
	   }
	   return str;	
	}
});