Info

for loop speed vs slice

Preparation code

 
<script>
  Benchmark.prototype.setup = function() {
    var foo = [1, 2, 3, 4, 5, 6];
    
    var bar = [];
    
    function CloneArray(arr)
    {
     return arr.slice(0);
    }
  };
</script>

Test runner

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for(var k in foo)
{
bar[k] = foo[k];
}

bar = CloneArray(foo);

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