In moodle 1.9 we spent a lot of time optimising the page load speeds and improving the quality of our code.
Using tools including:
allowed us to analyses what was slowing pages down, and how to improve this.
1. Minify and compress
2. Load things in the right place
3. Don’t load things you don’t need
$THEME->parents_exclude_sheets = array();
For anyone interested in speeding up their site – the best practice guidelines by yahoo & google (along with the tools above) can be an interesting insight into improving things for your users, and making your code better.
So far, we are just evaluating a test install of moodle2, but will be updating the blog with further findings.