If it's that bad, you should use static pages.

Ok, how do I switch to static pages? What's the drawback?

Enter a static file name in the blogs tab. Make sure your .htaccess is set to use that instead of your .php file. Click on generate static page when you've made a post.

The drawbacks are that you need to generate the page for any changes to show up. For example, it will still show 'no comments' even if there are comments, until you re-generate the page.

The static page is now generated but I can't find the htaccess file that has blog.php to change it to blog.html. Do you know where it's located in the directory? :p

I'm wondering if Trackbacks and PingBacks (under advanced) are using resources constantly and, if so, how much... Any idea?

You have to create the .htaccess
Search on the forums (or on the web) you will tutorial for .htaccess file

Didn't want to do something silly... So I'll use the default htaccess for that site.

Merci !

The main issue of the static pages is they have to be generated manually. Moreover, when your blog becomes popular, about 20 to 60% of your visits come from search engines and direct visitors to articles instead of the blog's homepage.

You can reduce your CPU usage by removing features from your skin. Remove top and recent referrers, remove recent comments and so on.

You can also implement the [url=http://forums.b2evolution.net/viewtopic.php?t=4672]Simple Cache Hack[/url] to reduce MySQL accesses.