Clumps Mod for Minecraft 1.19.3, 1.19.2, 1.19.1 and 1.19, is responsible for removing unnecessary experience particles, preventing performance drops that occur with these pellets. In other words, the number of FPS will increase.
In fact, its only function is that, for example, to prevent dozens and dozens of experience balls from coming out when killing the End dragon, which will only give lag. Of course, it will work seamlessly with all other Minecraft mods.
Clumps is in charge of optimizing the game, eliminating the horrible experience balls from the field of vision, although there will always be at least one, although with some exceptions. Now, creatures that are killed near the player will not drop any XP balls, something that was somewhat different in the default version.
Basically, and by default, XP orbs will be grouped into a single entity, thus reducing performance drops caused when there are many of these pellets in a small area. Of course, this will also cause players to immediately collect the orbs once they are touched.
Clumps optimizes the game’s performance, preventing unnecessary experience particles from generating any lag or performance drop.