Empty array

JavaScript performance comparison

Revision 61 of this test case created

Preparation code

 
<script>
Benchmark.prototype.setup = function() {
    var obj = { arr : [{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"},{a: 1, b: "2"}] };
};
</script>

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Testing in unknown unknown
Test Ops/sec
length
obj.arr.length = 0;
obj.arr = [];
pending…
arr = null
obj.arr = null;
obj.arr = [];
pending…
delete arr
delete obj.arr;
obj.arr = [];
pending…
arr = []
obj.arr = [];
pending…
arr = new Array
delete obj.arr;
obj.arr = new Array();
pending…

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