Simon Willison’s Weblog

Items tagged performance, jquery

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Lazy Load Plugin for jQuery. I’m using this jQuery plugin to save some bandwidth when people first view my Redis tutorial slides. It unobtrusively replaces images on a page with a placeholder graphic, then sets them to load automatically as the user scrolls down the page. # 26th April 2010, 12:02 am

Dojo 1.4.1 vs jQuery 1.4.2pre on Taskspeed. John Resig’s reponse. When JavaScript libraries compete on performance, everybody wins. # 29th January 2010, 2:19 pm

Dojo: Still Twice As Fast When It Matters Most. Alex Russell shows how Dojo out-performs jQuery on the TaskSpeed benchmark, which attempts to represent common tasks in real-world applications and has had code that have been optimised by the development teams behind each of the libraries. # 28th January 2010, 10:40 pm

jQuery 1.4 Alpha 1 Released. Impressively the new version contains no new features at all (correct me if I’m wrong), instead focusing on significant performance improvements to the existing API. # 5th December 2009, 5:31 pm

jQuery 1.3.1 Released. Bug fix for 1.3, mainly browser compatibility issues. Of interest: jQuery no longer ship a packed version (where JS is used to further decompress a string), as their tests show that this reduces performance due to the overhead of the extra decompression. They still provide a YUI Compressor minified version. # 22nd January 2009, 10:41 am

“Why doesn’t jQuery have an XPath CSS Selector implementation?” For now, my answer is: I don’t want two selector implementations—it makes the code base significantly harder to maintain, increases the number of possible cross-browser bugs, and drastically increases the filesize of the resulting download.

John Resig # 11th February 2008, 5:31 am