I'm running WP 3.3 Multisite with Domain Mapping, and every site of my network seems to have a few seconds delay before processing and loading any page. To be clear, when I enter the URL or click a link, it keeps me "waiting for domain.com..." about 4/5 seconds, and then shows me the page immediately.
I've been tracking this with my hosting support, and we ruled out the VPS hardware or software configuration. We also tried a fresh install of WP Single (will try Multisite there soon) and it doesn't seem to have this delay.
Did anyone experienced something like this? Did you find out what was causing it? How did you fix it?
Thanks in advance,