Preparation code

<script src="//ajax.googleapis.com/ajax/libs/mootools/1.3/mootools-yui-compressed.js"></script>
 
<script>
  Benchmark.prototype.setup = function() {
    var src = [];
    for (var i = 0; i < 5000; i++) {
    src.push(i);
    }
    
    var cv,ci;
  };
</script>

Preparation code output

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src.each(function(value,index) {
cv = value;
ci = index;
});

src.each(function(value) {
cv = value;
});

for(var i = 0; i < src.length; i++) {
cv = src[i];
ci = i;
}

for(var i = 0; i < src.length; i++) {
cv = src[i];
}

for(var i = 0, l = src.length; i < l; i++) {
cv = src[i];
ci = i;
}

for(var i = 0, l = src.length; i < l; i++) {
cv = src[i];
}

var i,v;
while(v = src[i++]) {
cv = v;
ci = i;
}

var i,v;
while(v = src[i++]) {
cv = v;
}

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