This mod increases fps by not rendering particles that the player can't see, the effect is especially dramatic in the ocean. Clientside only, will not do anything on the server.
With culling
without culling
Note: this mod requires mixin, failing to add it will not apply the culling effect
https://github.com/LXGaming/MixinBootstrap/releases/download/v1.0.2/MixinBootstrap-1.0.2.jar