copy array slice-vs-concat

JavaScript performance comparison

Revision 5 of this test case created

Preparation code

<script>
  var a = [];

  for (var i = 0; i < 10000; i++)
    a.push('550e8400-e29b-41d4-a716-446655440000');
</script>

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Testing in unknown unknown
Test Ops/sec
concat
var b = a.concat();
pending…
json
var b = JSON.parse(JSON.stringify(a));
pending…
slice
var b = a.slice(0);
pending…
concat new
var b = [].concat(a);
pending…

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