PigPog hasn’t performed well for a long time. Pages have been taking a long time to generate, and a long time to download and display.
I’ve designed a new theme today, keeping it very simple. The result is that pages take around a fifth as many database queries to generate, and are created in a fraction of the time by the server. The difference seems pretty noticeable. The front page doesn’t display any posts any more – it’s just a static introduction.
I’ll probably continue tweaking it a little, but I like the simplicity, and I like the speed.