string concat vs array join

JavaScript performance comparison

Revision 54 of this test case created by

Preparation code


      
      <script>
Benchmark.prototype.setup = function() {
  words = ['this', 'is', 'a', 'test'];

};
</script>

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Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
Concat
var text = '';
for (var i = 0; i < 10000; ++i)
{
    text += '<div>Hello world</div>';
}

pending…
Push and join
var arr = [];
for (var i = 0; i < 10000; ++i)
{
    arr.push('<div>Hello world</div>');
}
var text = arr.join('');
pending…
Insert and join
var arr = [];
for (var i = 0; i < 10000; ++i)
{
    arr[i] = '<div>Hello world</div>';
}
var text = arr.join('');
pending…

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