So I wrote EzGz this afternoon. It is, by far, the simplest plugin I’ve ever written. The actual source is probably two orders of magnitude smaller than the comments (plugin details and the license).

All EzGz does is enable the built-in PHP gzip/deflate handler. This does require output buffering, so it’s not right for everyone. Some themes or other plugins may already do this.

I’ve tried using the zlib.output_compression ini setting, but on my server, with zlib working otherwise correctly, the setting had no effect. So I stuck with the output buffering.

You can download it, or check it out of svn, then turn it on and see if it works.