Append string vs join array

JavaScript performance comparison

Revision 27 of this test case created

Preparation code

<script src="//code.jquery.com/jquery-2.0.3.min.js"></script>
<div id="fox"></div>
<script>
Benchmark.prototype.setup = function() {
    var i = 0, str = '', arr = [],
    w1 = 'brown', w2 = 'jumped', w3 = 'lazy';
    var element = $('#fox');
};

Benchmark.prototype.teardown = function() {
    $('#fox').empty();
};
</script>

Preparation code output

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Testing in unknown unknown
Test Ops/sec
String append #1
str += 'Quick ' + w1 + ' fox ' + w2 + ' over the ' + w3 + ' dog. ';
pending…
String append #2
element.append('Quick ' + w1 + ' fox ' + w2 + ' over the ' + w3 + ' dog. ');
pending…
Array join #1
['Quick ', w1, ' fox ', w2, ' over the ', w3, ' dog. '].join('');
pending…
Array join #2
element.text('Quick ' + w1 + ' fox ' + w2 + ' over the ' + w3 + ' dog. ').text;
pending…

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