There are several different server implementations that are aimed toward different goals; some are more configurable, some perform drastically better by modifying game mechanics like Redstone, mob behavior or lighting. These modifications can make the game work in unexpected ways.
- If adhering to vanilla (unmodded singleplayer like) Minecraft behavior is important, you could probably first start with Fabric (or even the official server if performance isn't that important). If using Fabric, you can further increase its performance by installing mods on the server; popular ones are Lithium and Phosphor since they aim to make the server run better without the players even noticing.
- Another option is Paper, which is specifically aimed for performance at the cost of simplifying some game mechanics, like how hoppers work. If technical Minecraft like item entity sorters isn't something you'd worry about not working, Paper would be a good option.

Note that in most cases, playing on the server for a long time without restarting will make its performance decrease until you do (the official server tends to suffer most from this).
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