Preparation code

 
<script>
  Benchmark.prototype.setup = function() {
    var myArray = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 1, 2, 3, 4, 5, 6, 7, 8, 9, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 4, 3, 2, 5, 6, 3, 4, 7, 5, 6, 8, 1, 8];
  };
</script>

Test runner

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myArray = [];

myArray.length = 0;

myArray = undefined;

myArray = null;

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