<script src='https://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js'></script>
<script>
var $jq1102 = $.noConflict(true);
</script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<script>
var $jq351 = $.noConflict(true);
</script>
<div>
<ul id="menu">
<li class="menu-item">1</li>
<li class="menu-item">2</li>
<li class="menu-item">3</li>
<li class="menu-item">4</li>
</ul>
</div>
function tests($) {
$(".menu-item").eq(2).closest("ul").css({
"background-color": "red"
}).parent().css({
"border": "1px solid blue"
}).append($("<p></p>").text("Text.").css({
"background-color": "green"
})).end().end().remove();
console.log('tests' + $);
}
tests($jq1102);
tests($jq351)
--enable-precise-memory-info
flag.
Test case name | Result |
---|---|
$jq1102 | |
$jq351 |
Test name | Executions per second |
---|---|
$jq1102 | 2077.9 Ops/sec |
$jq351 | 2902.5 Ops/sec |
I'll break down the provided JSON and explain what's being tested, compared, and other considerations.
Benchmark Definition
The benchmark is designed to compare the performance of two versions of jQuery: 1.10.4 and 3.5.1. The script preparation code uses these two versions to execute a series of DOM manipulation operations on an HTML page.
Script Preparation Code
The script preparation code defines a function tests($) { ... }
that takes a jQuery object $
. This function performs the following operations:
ul
element for the 3rd menu item ($( ".menu-item" ).eq(2).closest("ul")
) and sets its background color to red.Html Preparation Code
The HTML preparation code includes two versions of jQuery: 1.10.2 and 3.5.1, both loaded in separate script tags using the $.noConflict(true)
method to avoid conflicts between the two libraries. The HTML page also contains a simple menu structure with four menu items.
Individual Test Cases
The benchmark defines two individual test cases:
tests($jq1102);
: Tests jQuery 1.10.4.tests($jq351);
: Tests jQuery 3.5.1.These test cases execute the script preparation code using each of the two jQuery versions.
Library: $
The $
symbol represents the jQuery library, which is used to manipulate the DOM and execute the script preparation code.
Special JS Feature/Syntax
There are no special JavaScript features or syntax mentioned in the benchmark definition. However, it's worth noting that using $.noConflict(true)
to load multiple versions of jQuery can be considered an advanced technique.
Pros and Cons of Different Approaches
Comparing two versions of jQuery involves several considerations:
Other Considerations
When comparing JavaScript libraries, other considerations include:
Alternatives
Other alternatives for benchmarking JavaScript libraries include: