Hi Robert, find answers inline.
On 14.09.2010 15:43, Robert Buckley wrote: > hi, > > my app takes (according to firebug) > > > ...39.87s (onload: 26.93s) > > > This is rather long for an app which isn´t really big. > > > Do the following make a difference to the loading time? > > - Minifying the js? > Yes, minifying reduces the ammount of code to be transmitted from server to client. > - removing the parts of ext.js that are not used ..ie custom build > Yes, as fewer bytes need to be transported. > - removing the parts of openlayers.js that are not used..ie custom build > Yes, see above. > - using postgis instead of shapefiles > IMO: No. the onload event shouldn't wait for the WMS-images to be returned, as you initialize the layers after wards, right. As for the performance of the WMS: It depends, more often than not I found shapefiles to be the fastes possibility. Shapefiles might have some deficiencies, performance was seldom one for me. > - removing all js from the html doc > IMO: Yes, as external ressources can be cached by the browser, whereas inline JS cannot > > > > are there any others?...which has the best result regarding performance and > useability? > > gzip your css/html/Javascript. generally follow the rules from yslow or google speed. http://developer.yahoo.com/yslow/help/ http://developer.yahoo.com/performance/rules.html http://code.google.com/speed/page-speed/ http://code.google.com/speed/page-speed/docs/rules_intro.html Andreas (Hocevar) held a talk at this years FOSS4G with other recommendations regading performance: http://2010.foss4g.org/presentations_show.php?id=3335 Maybe they put up the slides/link of the presentation sometime soon. Regards, Marc > Cheers for any thoughts, > > > Rob > > > _______________________________________________ > Users mailing list > [email protected] > http://www.geoext.org/cgi-bin/mailman/listinfo/users > > -- ................................................................. Karten im (Inter|Intra)net? OpenLayers - Webentwicklung mit dynamischen Karten und Geodaten von M. Jansen und T. Adams, OpenSourcePress, München. ISBN: 978-3-937514-92-5 URL: http://openlayers-buch.de ................................................................. Dipl.-Geogr. Marc Jansen - Anwendungsentwickler - terrestris GmbH& Co. KG Irmintrudisstraße 17 53111 Bonn Tel: ++49 (0)228 / 96 28 99 -53 Fax: ++49 (0)228 / 96 28 99 -57 Email: [email protected] Web: http://www.terrestris.de Amtsgericht Bonn, HRA 6835 Komplementärin: terrestris Verwaltungsgesellschaft mbH vertreten durch: Hinrich Paulsen, Till Adams _______________________________________________ Users mailing list [email protected] http://www.geoext.org/cgi-bin/mailman/listinfo/users
