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	<title>Comments on: 101 on jQuery Selector Performance</title>
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	<description>dynaTrace Blog on Performance, Scalabilty and Architecture - Java and .NET  Application Performance Management</description>
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		<title>By: dynaTrace AJAX Edition 1.6 available for public download Performance, Scalability and Architecture &#8211; Java and .NET Application Performance Management (dynaTrace Blog)</title>
		<link>http://blog.dynatrace.com/2009/11/09/101-on-jquery-selector-performance/comment-page-1/#comment-13447</link>
		<dc:creator>dynaTrace AJAX Edition 1.6 available for public download Performance, Scalability and Architecture &#8211; Java and .NET Application Performance Management (dynaTrace Blog)</dc:creator>
		<pubDate>Tue, 09 Mar 2010 15:06:05 +0000</pubDate>
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		<description>[...] CSS Lookups: 101 on jQuery Selector Performance,  101 on Prototype CSS [...]</description>
		<content:encoded><![CDATA[<p>[...] CSS Lookups: 101 on jQuery Selector Performance,  101 on Prototype CSS [...]</p>
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		<title>By: as</title>
		<link>http://blog.dynatrace.com/2009/11/09/101-on-jquery-selector-performance/comment-page-1/#comment-13228</link>
		<dc:creator>as</dc:creator>
		<pubDate>Tue, 02 Mar 2010 05:33:13 +0000</pubDate>
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		<description>thnaks</description>
		<content:encoded><![CDATA[<p>thnaks</p>
]]></content:encoded>
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		<title>By: aa</title>
		<link>http://blog.dynatrace.com/2009/11/09/101-on-jquery-selector-performance/comment-page-1/#comment-12891</link>
		<dc:creator>aa</dc:creator>
		<pubDate>Thu, 25 Feb 2010 20:55:40 +0000</pubDate>
		<guid isPermaLink="false">http://blog.dynatrace.com/?p=1076#comment-12891</guid>
		<description>as</description>
		<content:encoded><![CDATA[<p>as</p>
]]></content:encoded>
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		<title>By: How to Speed Up sites like vancouver2010.com by more than 50% in 5 minutes Performance, Scalability and Architecture &#8211; Java and .NET Application Performance Management (dynaTrace Blog)</title>
		<link>http://blog.dynatrace.com/2009/11/09/101-on-jquery-selector-performance/comment-page-1/#comment-12521</link>
		<dc:creator>How to Speed Up sites like vancouver2010.com by more than 50% in 5 minutes Performance, Scalability and Architecture &#8211; Java and .NET Application Performance Management (dynaTrace Blog)</dc:creator>
		<pubDate>Mon, 22 Feb 2010 03:26:31 +0000</pubDate>
		<guid isPermaLink="false">http://blog.dynatrace.com/?p=1076#comment-12521</guid>
		<description>[...] that cause huge overhead on pages with many DOM elements. I wrote two blogs about the performance impact of CSS Selectors in jQuery and [...]</description>
		<content:encoded><![CDATA[<p>[...] that cause huge overhead on pages with many DOM elements. I wrote two blogs about the performance impact of CSS Selectors in jQuery and [...]</p>
]]></content:encoded>
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		<title>By: Why Web 2.0 requires End-To-End Performance Analysis and How to Do It Performance, Scalability and Architecture &#8211; Java and .NET Application Performance Management (dynaTrace Blog)</title>
		<link>http://blog.dynatrace.com/2009/11/09/101-on-jquery-selector-performance/comment-page-1/#comment-12042</link>
		<dc:creator>Why Web 2.0 requires End-To-End Performance Analysis and How to Do It Performance, Scalability and Architecture &#8211; Java and .NET Application Performance Management (dynaTrace Blog)</dc:creator>
		<pubDate>Wed, 10 Feb 2010 15:19:58 +0000</pubDate>
		<guid isPermaLink="false">http://blog.dynatrace.com/?p=1076#comment-12042</guid>
		<description>[...] end-user performance. Check out the following blog entries about the performance impact of jQuery and Prototype. It shows how important it is for developers to understand the internals of frameworks [...]</description>
		<content:encoded><![CDATA[<p>[...] end-user performance. Check out the following blog entries about the performance impact of jQuery and Prototype. It shows how important it is for developers to understand the internals of frameworks [...]</p>
]]></content:encoded>
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		<title>By: Ensuring Web Site Performance &#8211; Why, What and How to Measure Automated and Accurately Performance, Scalability and Architecture &#8211; Java and .NET Application Performance Management (dynaTrace Blog)</title>
		<link>http://blog.dynatrace.com/2009/11/09/101-on-jquery-selector-performance/comment-page-1/#comment-10994</link>
		<dc:creator>Ensuring Web Site Performance &#8211; Why, What and How to Measure Automated and Accurately Performance, Scalability and Architecture &#8211; Java and .NET Application Performance Management (dynaTrace Blog)</dc:creator>
		<pubDate>Wed, 13 Jan 2010 14:32:03 +0000</pubDate>
		<guid isPermaLink="false">http://blog.dynatrace.com/?p=1076#comment-10994</guid>
		<description>[...] user. This can very often be seen when expensive CSS Selector Lookups (check out the blogs about jQuery and Prototype CSS Selector Performance) are used or when using dynamic elements like JavaScript [...]</description>
		<content:encoded><![CDATA[<p>[...] user. This can very often be seen when expensive CSS Selector Lookups (check out the blogs about jQuery and Prototype CSS Selector Performance) are used or when using dynamic elements like JavaScript [...]</p>
]]></content:encoded>
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		<title>By: 101 on Prototype CSS Selectors Performance, Scalability and Architecture &#8211; Java and .NET Application Performance Management (dynaTrace Blog)</title>
		<link>http://blog.dynatrace.com/2009/11/09/101-on-jquery-selector-performance/comment-page-1/#comment-9148</link>
		<dc:creator>101 on Prototype CSS Selectors Performance, Scalability and Architecture &#8211; Java and .NET Application Performance Management (dynaTrace Blog)</dc:creator>
		<pubDate>Mon, 30 Nov 2009 15:05:49 +0000</pubDate>
		<guid isPermaLink="false">http://blog.dynatrace.com/?p=1076#comment-9148</guid>
		<description>[...] specific to a certain JavaScript Library like Prototype. I recently blogged about the internals of CSS Selectors in jQuery. The same holds true for every JavaScript library that offers CSS Selectors. Certain lookups can be [...]</description>
		<content:encoded><![CDATA[<p>[...] specific to a certain JavaScript Library like Prototype. I recently blogged about the internals of CSS Selectors in jQuery. The same holds true for every JavaScript library that offers CSS Selectors. Certain lookups can be [...]</p>
]]></content:encoded>
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	<item>
		<title>By: 網站製作學習誌 &#187; [Web] 連結分享</title>
		<link>http://blog.dynatrace.com/2009/11/09/101-on-jquery-selector-performance/comment-page-1/#comment-9041</link>
		<dc:creator>網站製作學習誌 &#187; [Web] 連結分享</dc:creator>
		<pubDate>Sat, 28 Nov 2009 02:52:15 +0000</pubDate>
		<guid isPermaLink="false">http://blog.dynatrace.com/?p=1076#comment-9041</guid>
		<description>[...] 101 on jQuery Selector Performance [...]</description>
		<content:encoded><![CDATA[<p>[...] 101 on jQuery Selector Performance [...]</p>
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		<title>By: Performance Analysis of dynamic JavaScript Menus Performance, Scalability and Architecture &#8211; Java and .NET Application Performance Management (dynaTrace Blog)</title>
		<link>http://blog.dynatrace.com/2009/11/09/101-on-jquery-selector-performance/comment-page-1/#comment-8828</link>
		<dc:creator>Performance Analysis of dynamic JavaScript Menus Performance, Scalability and Architecture &#8211; Java and .NET Application Performance Management (dynaTrace Blog)</dc:creator>
		<pubDate>Mon, 23 Nov 2009 13:08:40 +0000</pubDate>
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		<description>[...] my previous post I talked about the impact of jQuery Selectors on a page that I analyzed. The page took 4.8 seconds [...]</description>
		<content:encoded><![CDATA[<p>[...] my previous post I talked about the impact of jQuery Selectors on a page that I analyzed. The page took 4.8 seconds [...]</p>
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		<title>By: Andreas Grabner</title>
		<link>http://blog.dynatrace.com/2009/11/09/101-on-jquery-selector-performance/comment-page-1/#comment-8603</link>
		<dc:creator>Andreas Grabner</dc:creator>
		<pubDate>Wed, 18 Nov 2009 13:37:42 +0000</pubDate>
		<guid isPermaLink="false">http://blog.dynatrace.com/?p=1076#comment-8603</guid>
		<description>@Ben: the tests that I have done were on IE7. The new native query methods are not supported by older browser versions (which unfortunately are still making up the biggest market share). Here is an interesting link to check out &lt;a href=&quot;http://weblogs.asp.net/bleroy/archive/2009/08/31/queryselectorall-on-old-ie-versions-something-that-doesn-t-work.aspx&quot;&gt;querySelectorAll on old IE versions: something that doesn’t work&lt;/a&gt;
I will take some time and test newer versions of jQuery on different versions of IE (6, 7 and 8 ) and I am going to publish those results. We should definitely see an improvment in IE8 because IE8 implements several query methods natively</description>
		<content:encoded><![CDATA[<p>@Ben: the tests that I have done were on IE7. The new native query methods are not supported by older browser versions (which unfortunately are still making up the biggest market share). Here is an interesting link to check out <a href="http://weblogs.asp.net/bleroy/archive/2009/08/31/queryselectorall-on-old-ie-versions-something-that-doesn-t-work.aspx">querySelectorAll on old IE versions: something that doesn’t work</a><br />
I will take some time and test newer versions of jQuery on different versions of IE (6, 7 and 8 ) and I am going to publish those results. We should definitely see an improvment in IE8 because IE8 implements several query methods natively</p>
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