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Very slow UpdatePanel refresh when containing big ListBoxes or DropDownLists ~ Siderite's Blog
https://siderite.blogspot.com/2008/06/very-slow-updatepanel-refresh-when.html
Saturday, June 14, 2008. Very slow UpdatePanel refresh when containing big ListBoxes or DropDownLists. Update: this fix is now on CodePlex: CodePlex. Get the latest version from there. The scenario is pretty straightforward: a ListBox. Or any control that renders as a Select. Html element with a few thousand entries or more causes an asynchronous UpdatePanel. Update to become incredibly slow on Internet Explorer and reasonably slow on FireFox, keeping the CPU to 100% during this time. Why is that? So if ...
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CodePlex - Siderite
http://www.codeplex.com/site/users/view/Siderite
Project Hosting for Open Source Software. Member Since July 26, 2007. Last Visit March 28, 2016. AdBlockPlus to Privoxy translator. C# 4.0 library to generate INotifyPropertyChanged proxy from POCO type. Convert Regex to XML and back. F# Active Patterns in C#. JQuery pluing generates custom Refresh event. Sift String Distance and Similarity algorithm. Slow Large ListControl in UpdatePanel fix. Stretched Background Image jQuery plugin. Using Reactive Extensions in .NET - an introduction.