Try NetSurf, if you haven't already. It's not perfect but it's a bit faster than Dillo is. (The build process feels a little wobbly to get used to but it honestly takes 3-5 minutes to build.)

I used Dillo between 209 and 2012 on an old 800MHz AMD box. It was really nice... being able to resume from hibernation, have 800 tabs open, and have a hyper-responsive machine. :D