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http://jira.xwiki.org/jira/browse/XWIKI-2022?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_21861
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Vincent Massol commented on XWIKI-2022:
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It also seems that for some reason the style.css file is loaded twice for each
page invocation. Need to find out why and remove the second loading.
> Improve page loading times
> --------------------------
>
> Key: XWIKI-2022
> URL: http://jira.xwiki.org/jira/browse/XWIKI-2022
> Project: XWiki Platform
> Issue Type: Improvement
> Components: Templates, Skins & User Interface
> Affects Versions: 1.2
> Reporter: Vincent Massol
> Fix For: 1.3 M1
>
> Attachments: yslow.png
>
>
> Over time the xwiki skins in general have added JS, CSS, images. This is
> making xwiki pages slow to load as shown by YSlow (see attached image).
> What we should do:
> * Reduce the number of JS to load by moving out JS that are not needed for
> all pages so that they are loaded on demand
> * GZip all HTTP response contents
> * Modify the build to automatically merge all CSS and JS files together in a
> single file (see
> http://aciddrop.com/2008/01/03/automatically-join-your-javascript-and-css-into-a-single-file/)
> * Add expire headers. We need to be careful with this and probably do what
> yahoo recommends: modify the file names when they change so that clients get
> the newer versions. Otherwise they'll need to remember to refresh their
> caches. This can be automated in the build and should be pretty easy
> especially if we merge all files into a single one.
> * Minify CSS and JS files
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