// Float32Array
 
var ary32 = new Float32Array(100000000);
 
var start = +new Date();
    for(var i=0, l=ary32.length; i < l; i++){
        ary32[i] = 0.1234567890123456;
    }
alert( "Write: " + ( + new Date() - start ) );
// 1455ms
 
var val = 0;
var start = +new Date();
    for(var i=0, l=ary32.length; i < l; i++){
        val = ary32[i];
    }
alert( "Read: " + ( +new Date() - start ) );
// 1109ms
 
var start = +new Date();
var ary32Copy = new Float32Array(ary32.length);
    for(var i=0, l=ary32.length; i < l; i++){
        ary32Copy[i] = ary32[i];
    }
alert( "Loop Copy: " + ( + new Date() - start ) );
// 1969ms
 
var start = +new Date();
var ary32SliceCopy = new Float32Array(ary32.slice(0, ary32.length));
alert( "Slice Copy: " + ( + new Date() - start ) );
// 503ms

// Regular JavaScript Array
 
var ary = new Array(100000000);
 
var start = +new Date();
    for(var i=0, l=ary.length; i < l; i++){
        ary[i] = 0.1234567890123456;
    }
alert( "Write: " + ( + new Date() - start ) );
// 8947
 
var val = 0;
var start = +new Date();
    for(var i=0, l=ary.length; i < l; i++){
        val = ary[i];
    }
alert( "Read: " + ( +new Date() - start ) );
// 1948
 
var start = +new Date();
var aryCopy = new Array(ary.length);
    for(var i=0, l=ary.length; i < l; i++){
        aryCopy[i] = ary[i];
    }
alert( "Loop Copy: " + ( + new Date() - start ) );
// SCRIPT STOPS WITHOUT ERROR MESSAGE!!
 
var start = +new Date();
var arySliceCopy = new Array(ary.slice(0, ary.length));
alert( "Slice Copy: " + ( + new Date() - start ) );
//1125