compare+ and join

JavaScript performance comparison

Revision 2 of this test case created

Info

var bigArray = []; for (var i = 0; i < 100; i++) { bigArray.push('This is a test!test!test!aaaaaaaaaaaaaaaaaaaaaa bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbccccccccccccccccccccccccccccccccccccccccccc eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee ddddddddddddddddddddddddddddddddddddddddddddddddddd fffffffffffffffffffffffffffffffffffffffffffffff ggggggggggggggggggggggggggggggggggggggggggggg hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh'); }

Preparation code

<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
 
<script>
Benchmark.prototype.setup = function() {
    var bigArray = [];
    for (var i = 0; i < 100; i++) {
      bigArray.push('This is a test!test!test!aaaaaaaaaaaaaaaaaaaaaa bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbccccccccccccccccccccccccccccccccccccccccccc eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee ddddddddddddddddddddddddddddddddddddddddddddddddddd fffffffffffffffffffffffffffffffffffffffffffffff ggggggggggggggggggggggggggggggggggggggggggggg hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh');
    }
};
</script>

Preparation code output

Test runner

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Testing in unknown unknown
Test Ops/sec
''
var result = '';
for (var i = 0, length = bigArray.length; i < length; i++) {
  result += bigArray[i];
}
pending…
join
var result = bigArray.join('');
pending…

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