When I only had 30 entries on Blosxom, this blog ran great. Over the last five years, however, I've written almost 2,000 posts, and the original Perl script has started to bog down a bit. Adding an plugin to cache the filesystem helped some, but it still takes a little more than 2 seconds to render the page. I think it has something to do with the Perl interpreter--there's some discussion online about how Blosxom doesn't like running under Apache's mod_perl, or something like that. As far as I'm concerned, Apache is a practical joke played on DYI-types by malicious shell coders, so I can't really be bothered to find out.
Long story short, last night I rewrote Blosxom as a PHP script. That sounds really hardcore, until you realize that A) it's only 16KB to begin with, and B) I took out all the features I don't use, like static rendering and complete plugin support (mine only supports entry and document processing plugins). It's running now at index.php instead of the old index.cgi, and I've redirected the domain default. I'll be leaving the old Perl script in place so that legacy links will continue to function, but anything that didn't specify an index script should now benefit from the speed boost.
If you're reading this via Google Reader, you probably don't need to do anything--Google doesn't care how slow my server is. On other RSS readers, you may notice a faster refresh and more accurate post times by switching to the new feed. And if you read via the actual page (or link to it) at the .cgi URL, you'll notice a real difference by switching to the new URL--it's about an order of magnitude faster, going from ~3 seconds to ~300ms in my tests, even without optimizations.