Server Performance

This page will house server performance tips similar to Low End PCs does for clients.

Mods

Make sure fastcraft is enabled (it should be in the server download but may need a rename to .jar)
Optifine is client only - make sure it's not loaded on the server

Lag

You can use /xu_tps on the client (type it in chat) to see if the server is experiencing tic lag – if the numbers are consistently red you have an issue. If they're continually white, but you're getting lag, you may have FPS lag – see Low End PCs for client performance tips.

You can use various profiling tools to find lag. Some of the most popular are:

Opis
Warmroast
Plan Plugin

Some are mods you install into the server (and client); others are programs that run on the server. Not all may be available to you depending on your server setup.