concat vs join

JavaScript performance comparison

Revision 2 of this test case created

Info

Pruf

Preparation code

 
<script>
Benchmark.prototype.setup = function() {
    var list = [];
    for(var i=0; i<10000; i++) {
        list.push(i);
    }
};
</script>

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Testing in unknown unknown
Test Ops/sec
concat
var str = '';
for(var i=0; i<10000; i++) {
    str += list[i];
}
pending…
join
var str = list.join('');
pending…
join+add
var str = [];
for(var i=0; i<10000; i++) {
    str.push(i);
}
str.join('')
pending…

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