copy array slice-vs-concat

JavaScript performance comparison

Revision 2 of this test case created

Preparation code

<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js">
</script>

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Testing in unknown unknown
Test Ops/sec
slice
var a = [];
for (var i = 0; i < 10000; i++) a.push('550e8400-e29b-41d4-a716-446655440000');

var b = [];
for (var j = 0; j < 100000; j++) b = a.slice(0);
pending…
concat
var a = [];
for (var i = 0; i < 10000; i++) a.push('550e8400-e29b-41d4-a716-446655440000');

var b = [];
for (var j = 0; j < 100000; j++) b = [].concat(a);
pending…
jquery
var a = [];
for (var i = 0; i < 10000; i++) a.push('550e8400-e29b-41d4-a716-446655440000');

var b = [];
for (var j = 0; j < 100000; j++) b = $.extend({}, a);
pending…

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