On some sites I create, when navigating from page to page, there is a millisecond of totally white blank page before the normal page loads up. I used to think this had to do with caching issues. Recently I coded a site (still in testing) which has virtually no php, javascript or anything fancy. It’s essentially just straight html & css, and very sparsely written. There is also a .htaccess requiring cache of all js, css, img, etc. The page itself loads very fast.
Some sites seem to have this white flicker or flash of nothing in between pages. Other site don’t. I’ve never been able to figure out what it is. Chrome & Firefox both exhibit this behavior.
I accidentally had a call for a nonexistant js file in the head (leftover from a template). The millisecond of white blankness was the server trying to get the file, looking for it, and not finding it. 🙁