boost em FPS to the MAX
ComangliaComs config - Comanglia updated according to mastercomfig
ComangliaComs conservative - Only minimum changes
chris' maxframes mastercoms edit - Changelog
mastercomfig, the most up to date config.
Mods and VPKs - Some vpk mods can give a small boost in performance.
-dxlevel 80: The most buggy and unstable DX version. Not recommended.
-dxlevel 81: Gives the most raw FPS. Lacks DX9 optimizations. Weapon skins not supported. Rocket trails shorter and easier to see through.
-dxlevel 90: Shader model 2. Probably the best DX9 version for Intel graphics or REALLY outdated GPUs.
-dxlevel 95: Shader model 3. Recommended.
-dxlevel 98: DirectX 9 Extended. Tend to perform better than other DX9 version in high-end GPUs. It's also the prettiest.
Perform benchmarks yourself to figure out what directx version is best for you. These are generally guidelines.
Jungle Inferno benchmark