Parent vs String Concat

JavaScript performance comparison

Test case created by Greg


Is it faster to inspect the id of an element and then use that to construct the id of a parent, or is it faster to use ancestry?

Preparation code

<div id="selectTop">
        <div id="select">The Selector</div>
<script src=""></script>
Benchmark.prototype.setup = function() {
    var thisId;

Benchmark.prototype.teardown = function() {
    var thisId = null;

Preparation code output

The Selector

Test runner

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Testing in unknown unknown
Test Ops/sec
Select By Parent
var thisId = $("#select").parent().parent()[0].id;
Select By Text Concat
var thisId = $("#" + $("#select")[0].id + "Top")[0].id;

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