jQuery selector performance

Posted by rahul on Stack Overflow See other posts from Stack Overflow or by rahul
Published on 2010-04-12T06:53:06Z Indexed on 2010/04/12 7:03 UTC
Read the original article Hit count: 604

Filed under:

jQuery

|

selector

|

Performance

I have the following two code blocks.

Code block 1

var checkboxes = $("div.c1 > input:checkbox.c2", "#main");
var totalCheckboxes = checkboxes.length;
var checkedCheckboxes = checkboxes.filter(":checked").length;

Code block 2

var totalCheckBoxes = $("div.c1 > input:checkbox.c2", "#main").length;
var checkedCheckBoxes = $("div.c1 > input:checkbox.c2:checked", "#main").length;

Which one of the above will be faster?

Thanks,

Rahul

© Stack Overflow or respective owner

Related posts about jQuery

Microsoft and jQuery

as seen on West-Wind - Search for 'West-Wind'
The jQuery JavaScript library has been steadily getting more popular and with recent developments from Microsoft, jQuery is also getting ever more exposure on the ASP.NET platform including now directly from Microsoft. jQuery is a light weight, open source DOM manipulation library for JavaScript that… >>> More
An Introduction to jQuery Templates

as seen on Stephen Walter - Search for 'Stephen Walter'
The goal of this blog entry is to provide you with enough information to start working with jQuery Templates. jQuery Templates enable you to display and manipulate data in the browser. For example, you can use jQuery Templates to format and display a set of database records that you have retrieved… >>> More
Ajax Control Toolkit December 2013 Release

as seen on Stephen Walter - Search for 'Stephen Walter'
Today, we released a new version of the Ajax Control Toolkit that contains several important bug fixes and new features. The new release contains a new Tabs control that has been entirely rewritten in jQuery. You can download the December 2013 release of the Ajax Control Toolkit at http://Ajax.CodePlex… >>> More
jQuery show "loading" during slow operation

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm trying to show a small loading image during a slow operation with jQuery and can't get it right. It's a BIG table with thousands of rows. When I check the "mostrarArticulosDeReferencia" checkbox it removes the "hidden" class from these rows. This operation takes a couple of seconds and I want… >>> More
Tracking download of non-html (like pdf) downloads with jQuery and Google Analytics

as seen on Developer IT - Search for 'Developer IT'
Hi folks, it’s been quite calm at Developer IT’s this summer since we were all involved in other projects, but we are slowly comming back. In this post, we will present a simple way of tracking files download with Google Analytics with the help of jQuery. We work for a client that offers… >>> More

Related posts about selector

a selector which has this selector together with a class selector

as seen on Stack Overflow - Search for 'Stack Overflow'
Here is an analogy of my problem(a selector which has this selector together with a class selector): Let say that I selects all yellow(classes) div elements in a arbitrary HTML document. And I want each to check if the attribute is yes = 1. If the attribute 'yes' equals '1', then I want the child… >>> More
jQuery(selector) or $(selector), which one?

as seen on Stack Overflow - Search for 'Stack Overflow'
Hello Which is better way to use jQuery? I've heard that jQuery(element) doesn't ruin code in e.g. Wordpress. But $ is easier and faster to write. Which one do you prefer and why? Martti Laine >>> More
Reuse cached selector inside a child selector

as seen on Stack Overflow - Search for 'Stack Overflow'
var $container = $('div#myContainer'); var $panels = $('div#myContainer > div'); Is it possible to reuse the selector I've already cached in $container within the next child selector? >>> More
Python dictionary key missing

as seen on Stack Overflow - Search for 'Stack Overflow'
I thought I'd put together a quick script to consolidate the CSS rules I have distributed across multiple CSS files, then I can minify it. I'm new to Python but figured this would be a good exercise to try a new language. My main loop isn't parsing the CSS as I thought it would. I populate a list… >>> More
nth child selector in jquery

as seen on Stack Overflow - Search for 'Stack Overflow'
<table width="600px" id='testTable'> <tr class="red"><td>this</td></tr> <tr><td>1</td></tr> <tr><td>1</td></tr> <tr><td>1</td></tr> <tr class="red"><td>1</td></tr> … >>> More