jQuery append vs html vs innerHTML list performance

JavaScript performance comparison

Revision 64 of this test case created

Info

Just a simple example showing the speed difference between populating a list with .append() & .html() and innerHTML

Preparation code

<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js">
</script>
<div id="list" style="display:none">
</div>
<script>
Benchmark.prototype.setup = function() {
    var items = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21]
    var len = items.length;
};
</script>

Preparation code output

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Testing in unknown unknown
Test Ops/sec
jquery .append()
var html = '';
for (var i = 0; i < len; i++) {
  html += '<div>Test ' + items[i] + '</div>';
}

$('#list').append(html);
pending…
jQuery .html()
var html = '';
for (var i = 0; i < len; i++) {
  html += '<div>Test ' + items[i] + '</div>';
}

$('#list').html(html);
pending…
javascript innerHTML
var list = document.getElementById('list');
for (var i = 0; i < len; i++) {
  list.innerHTML = list.innerHTML + '<div>Test ' + items[i] + '</div>';
}
pending…
Concat
var html = [];
for (var i = 0; i < len; i++) {
  html.push('<div>Test ' + items[i] + '</div>');
}
$("#list").html(html.join(' '));
pending…
html after loop
var list = document.getElementById('list');
var html = '';
for (var i = 0; i < len; i++) {
  html += '<div>Test ' + items[i] + '</div>';
}
list.innerHTML = html;
pending…
html after loop upgraded
var list = document.getElementById('list');
var html = '';
for (var i = 0; i < len; html += ('<div>Test ' + items[i++] + '</div>')) {}
list.innerHTML = html;
pending…

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