<script src='https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js'></script>
<script>
var $jq1124 = $.noConflict(true);
</script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.2.4/jquery.min.js"></script>
<script>
var $jq224 = $.noConflict(true);
</script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script>
var $jq331 = $.noConflict(true);
</script>
<div>
<ul id="menu">
<li class="menu-item">1</li>
<li class="menu-item">2</li>
<li class="menu-item">3</li>
<li class="menu-item">4</li>
</ul>
</div>
function tests($) {
$(".menu-item").eq(2).closest("ul").css({
"background-color": "red"
}).parent().css({
"border": "1px solid blue"
}).end().end().remove();
}
tests($jq1124);
tests($jq224);
tests($jq331);
--enable-precise-memory-info
flag.
Test case name | Result |
---|---|
$jq1124 | |
$jq224 | |
$jq331 |
Test name | Executions per second |
---|---|
$jq1124 | 586200.1 Ops/sec |
$jq224 | 604518.1 Ops/sec |
$jq331 | 605916.2 Ops/sec |
Let's break down what's being tested in this benchmark.
What is being tested?
The provided JSON represents a JavaScript microbenchmark that measures the performance of different versions of jQuery (a popular JavaScript library for DOM manipulation). The test case consists of three individual tests:
$jq1124
: Tests jQuery version 1.12.4.$jq224
: Tests jQuery version 2.2.4.$jq331
: Tests jQuery version 3.3.1.Options compared
The benchmark compares the performance of these three different jQuery versions, specifically in terms of execution speed (measured as "ExecutionsPerSecond").
Pros and cons of each approach:
Library usage
In the provided HTML code, two instances of jQuery are loaded:
https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js
(jQuery version 1.12.4)https://ajax.googleapis.com/ajax/libs/jquery/2.2.4/jquery.min.js
(jQuery version 2.2.4)The $jq1124
, $jq224
, and $jq331
variables are used to access these jQuery instances in the test code.
Special JavaScript feature or syntax
There is no specific JavaScript feature or syntax being tested in this benchmark. The focus is on measuring the performance of different jQuery versions using a simple test case.
Other alternatives
Alternative approaches for testing performance might include:
Overall, the provided benchmark provides a simple and controlled way to compare the performance of different jQuery versions, which can be useful for developers who work with these libraries.