<form id="parent">
<input type="checkbox"/>
<input type="checkbox"/>
<input type="checkbox"/>
<input type="checkbox"/>
<input type="checkbox"/>
<input type="checkbox"/>
<input type="checkbox"/>
<input type="checkbox"/>
<input type="checkbox"/>
<input type="checkbox"/>
</form>
<script src='https://cdnjs.cloudflare.com/ajax/libs/jquery/3.4.1/jquery.js'></script>
var $formElement = $("#parent");
$formElement.find("input:checkbox");
$formElement.find(":checkbox");
$formElement.find("input[type='checkbox']");
$formElement.find("[type='checkbox']");
--enable-precise-memory-info
flag.
Test case name | Result |
---|---|
find by input and checkbox selector | |
find by checkbox selector | |
find by input and type checkbox | |
find by type checkbox |
Test name | Executions per second |
---|---|
find by input and checkbox selector | 30218.7 Ops/sec |
find by checkbox selector | 32901.9 Ops/sec |
find by input and type checkbox | 105631.2 Ops/sec |
find by type checkbox | 118652.3 Ops/sec |
Let's dive into the world of JavaScript benchmarks!
What is being tested?
MeasureThat.net is testing four different approaches to find checkboxes in a jQuery-enabled HTML form using various selectors.
Options compared:
find
with no selector ($formElement.find()
)find
with an input and checkbox selector ("input:checkbox"
or "input[type='checkbox']"
)find
with a checkbox selector ("[type=checkbox]"
or ":checkbox:"
)Pros and Cons of each approach:
find
method without specifying a specific element type."input:checkbox"
or "input[type='checkbox']"
)type
attribute on inputs, may not find checkboxes if there are multiple inputs with different types"[type=checkbox]"
or ":checkbox:"
)find
with a type attributetype
attribute on inputs, may not find checkboxes if there are multiple inputs with different typesLibraries and their purposes:
The benchmark uses jQuery, which is a popular JavaScript library for DOM manipulation and event handling. It provides various methods like find
, selector()
, and others to select elements in the document.
In this case, the find
method is used to find all elements matching the specified selector.
Special JS features or syntax:
The benchmark uses some older syntax that may not be widely supported:
[type=checkbox]
: This is an older syntax for specifying the type attribute on inputs. Modern browsers use type='checkbox'
.":checkbox:"
: This is a legacy syntax for selecting checkboxes, which has been deprecated in favor of the more modern [type="checkbox"]
or input[type="checkbox"]
.Alternatives:
If you're looking for alternative benchmarking tools or libraries that can help you measure performance and optimize your JavaScript code, here are a few options:
These tools can help you identify performance bottlenecks in your code, optimize it for better execution times, and ensure compatibility with different browsers and environments.