Sergiu Dumitriu schrieb: 
Jan Kurella wrote:
  
Short Summary:

Problem: Browser took over 30 seconds to load almost every page. 
Sometimes only few pages took that time - not possible to find any pattern.
Precisely: loading of some css-files took 30 seconds to load

Solution: Browser Firefox with Plugin Fasterfox. All Settings above 
"Moderat" that means, "optimized" and "Turbo" caused that problem.

Going Deeper in the settings it means, that the Option
Pipelining>Activate Pipelining caused the problem. Can't see why 
pipelining slowing down the J2EE-Server to timeout - but who knows?

Deactivating pipelining, solved the problem finally. Hope that helps you 
finding the problem. Pipelining should not lead to 30s load of 14kB 
css-files.

Jan
    

Thanks, at least now we know that XWiki (or tomcat?) doesn't work well 
with pipelining.

And this touches another problem, CSS files should have a cache policy 
so that they aren't transfered for each request.

Sergiu.
It was not Tomcat, it was SunAppServer (Glassfish). I already encountered the problem, that files that are not loaded directly but via Servlets aren't cached properly or at least cached as expected but reloaded more often than necessary.
So one solution that I suggest is not to load through
 
ip.adresse/xwiki/bin/skin/skins/albatross/fullscreenEdit.css
but instead directly with
ip.adresse/xwiki/skins/albatross/fullscreenEdit.css
That could help browser to enhance their caching possibilities and will  be extremly faster (factor 10) per file.
--

Jan Kurella

SATIS INFORMATION GmbH
Consultant

Köpenicker Straße 73
10179 Berlin

Tel: +49(30)430 77 66-2 Mobil: +49(174)770 3667
Fax: +49(30)430 77 66-3 E-Mail: jan.kurella@satis-information.de

Firma: SATIS INFORMATION GmbH
Sitz der Gesellschaft: Petershagen/Eggersdorf
Geschäftsführer und Gesellschafter: Heiko Scherpinski
Handelsregister : Amtsgericht Frankfurt (Oder)- HRB 9989

Diese E-Mail und alle Anhänge können vertrauliche und/oder rechtlich geschützte Informationen enthalten. Wenn Sie nicht der richtige Adressat sind oder diese E-Mail irrtümlich an Sie gesendet wurde, informieren Sie bitte sofort den Absender und vernichten Sie diese E-Mail. Das unerlaubte Kopieren, Speichern und Nutzen der Inhalte sowie die unbefugte Weitergaben dieser E-Mail ist nicht gestattet.

This e-mail and any attachment is for authorized use by the intended recipient(s) only. It may contain proprietary material, confidential information and/or be subject to legal privilege. It should not be copied, disclosed to, retained or used by, any other party. If you are not an intended recipient then please promptly delete this e-mail and any attachment and all copies and inform the sender. Thank you.