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Subject: Re: [docbook-apps] Slow TOC tree in webhelp when there are a largenumber of heading entries
On Thu, Mar 31, 2011 at 9:52 PM, Peter Desjardins <peter.desjardins.us@gmail.com> wrote: > Hi, I am using the webhelp output with a set of very long documents. > I'm seeing slow performance with the Javascript table of contents tree > when there are a large number of TOC entries. This causes a serious > problem because Internet Explorer opens a dialog box asking whether > I'd like to "stop running this script." > > Internet Explorer 8 displays the dialog box when I include about 690 > headings in my test document. The performance in Firefox, Chrome, and > Safari aren't that bad. The Internet Explorer dialog is really > unacceptable because it interrupts each page load. > > I'm looking into the underlying JavaScript. The developer tools in IE8 > tell me that a function named "L" is taking the most time. I think > that L is a part of the jquery libray. I'm not familiar with tuning > JavaScript though. > We use minimal-size compacted version of the treeview and JQuery-UI, so those names won't make any sense! :) > Has anyone else encountered this problem? Do you know a way to speed > up the TOC loading? WebHelp uses JQuery framework for JavaScript. The Tree generation is done by TreeView plugin for JQuery [1]. Note that it's not custom-made. There's an option to remove JavaScript-based dynamic generation of tree to pre-rendered tree. Have a look at the demos. [2] has a good documentation. This'll probably reduce the JavaScript execution since the tree is prerendered. Some new updates to the plugin since the release of the plugin. But I don't think it really changes anything. We've tested WebHelp with the book "DocBook: The Definitive Guide" which is comparatively very large [3], and we didn't see significant degradation of performance. I'm not in a position to test it again in IE since I'm on Ubuntu. [1] http://bassistance.de/jquery-plugins/jquery-plugin-treeview/ [2] http://www.dynamicdrive.com/dynamicindex1/treeview/index.htm [3] http://www.thingbag.net/docbook/gsoc2010/defguideout/content/pr02s01.html Regards, --Kasun > > Thanks for your help. > > Peter Desjardins > > --------------------------------------------------------------------- > To unsubscribe, e-mail: docbook-apps-unsubscribe@lists.oasis-open.org > For additional commands, e-mail: docbook-apps-help@lists.oasis-open.org > > -- ~~~*******'''''''''''''*******~~~ Kasun Gajasinghe, University of Moratuwa, Sri Lanka. Blog: http://kasunbg.blogspot.com Twitter: http://twitter.com/kasunbg
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