I've had a couple of drupal sites over the years and never had any trouble with the loading speed.
Until now... I've created a couple of new websites which sometimes loads very slowly. (Over 2 minutes!)
They were part of a multi-site installation,. So this being my first multi-site, I thought that might be te problem. So I've rebuild the site as a single site installation... but the same problem occurs.
The first page load is very slow (up to 1 / 2 minutes sometimes). Once the page is loaded, the loading time of the gets better by every click on the site... so I thought it had something to do with the caching, but I'm using al the caching options of the default drupal installation (under 'performance').
Furthermore, I've installed Y-slow and the site has a grade A with a performance score of 90.
But still, it sometimes takes over 100 seconds to load... And sometimes it takes less then a sec to load... I can't find any logic behind it...It's driving me creazy... so i hope some one can help me out with this issue.
These are the spec's of my site:
- Drupal 7.2
- Core modules installed: