Slow initial response then quick load for every page

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Hello,

I have a few C5 sites and they all are about the same performance-wise except for one which has a really annoying problem.

When you first access a page the browser hangs saying "waiting for site..." for about 10 seconds, then it quickly loads up.

It does this for all the pages you click. I assume there is a glitch somewhere like it's searching for a file/addon that isn't there or something similar, but I can't seem to track down what it is.

I have check the PHP error logs and there is nothing there.

Does anyone know if there are some common suspects or places I can look to try to troubleshoot this?

 
JohntheFish replied on at Permalink Reply
JohntheFish
Try looking at the browser developer console network tab as the site loads. It will show request start/end for each component of the page.

There are also various web page services that will give an analysis that I am sure others will chip in with, but the network tab of the the browser developer console is always a good place to start.
pvrpvr replied on at Permalink Reply
Thanks,

So I pulled it up with firebug in firefox and the network console shows the very first GET for the URL as 7.28s, before any actual page elements are loaded, after that, all the elements load up in 2 seconds or less.

I checked with nslookup and the DNS resolves fine (and it's the same dns servers and webserver that other C5 installs are on)