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    copied!<p><strong>input[name=chkbox]</strong> is coming in as the fastest jQuery selector on my machine under IE7.</p> <pre><code>Unchecking Took 2453ms Checking Took 2438ms Unchecking Took 2438ms Checking Took 2437ms Unchecking Took 2453ms Checking Took 2438ms </code></pre> <p><strong>input.chkbox</strong> and...</p> <pre><code>Unchecking Took 2813ms Checking Took 2797ms Unchecking Took 2797ms Checking Took 2797ms Unchecking Took 2813ms Checking Took 2797ms </code></pre> <p><strong>input:checkbox.chkbox</strong> seem tied</p> <pre><code>Unchecking Took 2797ms Checking Took 2797ms Unchecking Took 2813ms Checking Took 2781ms </code></pre> <p><strong>.chkbox</strong> almost takes twice as long as the input.chkbox</p> <pre><code>Unchecking Took 4031ms Checking Took 4062ms Unchecking Took 4031ms Checking Took 4062ms </code></pre> <p>The javascript for loop is by far the worst coming in at:</p> <pre><code>Checking Took 149797ms </code></pre> <p>150 seconds! It locks the browser too. This just makes me really impressed with jQuery. I honestly didn't expect it to be that slow. Probably because I'm passing across each individual element which it's then having to find...</p> <p>This was pretty interesting to me as well:</p> <p><strong>input[id^='chkbox']</strong></p> <pre><code>Unchecking Took 3031ms Checking Took 3016ms </code></pre> <p>took <strong>less</strong> time than:</p> <p><strong>input[id^='chkbox'][type='checkbox']</strong></p> <pre><code>Unchecking Took 3375ms Checking Took 3344ms </code></pre> <p>I thought since I posted more filters it'd be faster. Nope!</p> <p>Specifying even more paths to the checkbox makes it way slower:</p> <p><strong>#myTable tr[id^='row'] input[id^='chkbox'][type='checkbox']</strong></p> <pre><code>Checking Took 10422ms </code></pre> <p>It didn't even run the second uncheck as it asked me if I wanted to continue running scripts on my computer. Crazy! :P</p> <p><strong>Update Morning 4/14:</strong></p> <p>Someone brought up setting the context: I actually did a few of those and much to my suprise and against what a lot of people have said on the web <strong>on IE7 these were slower</strong>! Here are the times I got with a few different context's specified paired with the quicker selector's above:</p> <p><strong>"input.chkbox", "tr"</strong></p> <pre><code>Checking Took 8546ms </code></pre> <p><strong>"input.chkbox", "tr.myRow"</strong></p> <pre><code>Checking Took 8875ms </code></pre> <p><strong>"input.chkbox", "#form1"</strong></p> <pre><code>Unchecking Took 3032ms Checking Took 3000ms </code></pre> <p><strong>"input.chkbox", "#myTable"</strong></p> <pre><code>Unchecking Took 2906ms Checking Took 2875ms </code></pre> <p>Current winner (still): <strong>input[name=chkbox]</strong></p> <pre><code>Unchecking Took 2469ms Checking Took 2453ms </code></pre> <p><strong>"input[name=chkbox]", "tr.myRow"</strong></p> <pre><code>Checking Took 9547ms </code></pre> <p><strong>"input[name=chkbox]", "#form1"</strong></p> <pre><code>Unchecking Took 3140ms Checking Took 3141ms </code></pre> <p><strong>"input[name=chkbox]", "#myTable"</strong></p> <pre><code>Unchecking Took 2985ms Checking Took 2969ms </code></pre> <p><strong>Update 2 Morning 4/14</strong></p> <p>Thought I might have had a better one after I noticed a syntax difference from <a href="http://beardscratchers.com/journal/jquery-its-all-about-context" rel="nofollow noreferrer">http://beardscratchers.com/journal/jquery-its-all-about-context</a>. It seems that these are NOT the same as <strong>they are giving slightly better times, but still doesn't beat the non-contexted selector</strong> - darn.</p> <p><strong>"input[name=chkbox]", $("#form1")</strong></p> <pre><code>Unchecking Took 3078ms Checking Took 3000ms Unchecking Took 3078ms Checking Took 3016ms </code></pre> <p><strong>"input[name=chkbox]", $("#myTable")</strong></p> <pre><code>Unchecking Took 2938ms Checking Took 2906ms Unchecking Took 2938ms Checking Took 2921ms </code></pre> <p><strong>Update 3 Morning 4/14</strong></p> <p>Russ wanted me to try these out, they de/select ALL the boxes but again it was interesting:</p> <p><strong>:checkbox</strong></p> <pre><code>Unchecking Took 8328ms Checking Took 6250ms </code></pre> <p><strong>input:checkbox</strong></p> <pre><code>Unchecking Took 5016ms Checking Took 5000ms </code></pre> <p>-> Fastest?!?! <strong>input[type=checkbox]</strong></p> <pre><code>Unchecking Took 4969ms Checking Took 4938ms </code></pre> <p>The fact that the third up there is the fastest is quite interesting as that goes against what I would have thought. Why wouldn't (for IE7 at least) the :checkbox just use the type=checkbox to achieve a faster time? These are really close scores but the checking took 62ms less time. Also, why are the first two different at all? Is there a different element besides an input that can take have a checkbox?</p>
 

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