problems with performance

[vsevedko]

On my directory Katalóg V?evedko I have been noticing some problems for while with a performance.
I have a page caching turned on, but the first load takes a long of time - about five seconds. All browsing that follows on the site is fast enough, but that first load is terribly slow.
I have installed a clean wordpress install (Novinky) on the same server which loads much faster, so it shouldnt be a problem of serverhosting.
Do you have any ideas how to speed it up?

Can there be a problem with the scripts that loads banner ads? (script is calling a media agency server, where when there is no a capaign, it calls a google admanager service to supply its ads.)

[Bruceper]

It may be due to the ads, it also may be due to the hosts latency, disk I/O, routing etc.

It loaded up fairly quickly for me so I don't think it's an issue.

[CEC]

slow for me, too. don't know if you might find the following tool helpful:
Web Page Analyzer - free website optimization tool website speed test check website performance report from web site optimization

[Bruceper]

Or it could be due to the fact that we're in North American and the site is hosted in the Czech Republic? Say hello to latency.

I don't think we can help you here, being a few thousand miles away from the host doesn't make it any easier to diagnose a slow site.