Big performance differences between home- and sub-pages

[McTom]

After doing some performance optimizations with a few wordpress plugins, my homepage http://niasony.com improved a lot: http://www.webpagetest.org/result/130912_S5_M4F/

What is confusing me is that the improvements don't work on any subpage like http://niasony.com/category/presse: http://www.webpagetest.org/result/130912_JN_KG0/

These result is close to my home result - but before optimization. I'm confused, because the plugins should work for all pages of my wordpress site.

Any ideas what I'm doing wrong? And perhaps one further how i could get rid of the F in "Cache static content" (still not improved on home)?

Thank you in advance for any hint.
Tom

[pmeenan]

Looks like you are using wp super cache. My initial guess would be that your main page is a lot more likely to be cached that any of the deeper pages since it gets hit more frequently. A caching plugin can help hide really slow back-end issues but it doesn't really "fix" the issue.

Can you enable debugging of some kind for wp-super-cache to see if it is able to cache the deeper pages or if not, why?

Are there other plugins you are using as well?

[McTom]

Dear Patrick, thank you very much for you reply. Actually I'm using only wp super cache and wp widget cache. I already deactivated the last one, but with no effect. I`m still wondering that all subpages perform constantly bad - especially regarding compress transfer and images - while the home is far more "green". I'd be happy if you could help me with the wp super cache debugging protocol:

http://niasony.com/wp-content/cache/f1f4...549a29.txt

Thanks in advance
Tom