Java servers make minecraft interesting. you have to take care of the servers more. It is so that hoppers are very useful. but as soon as some of them exist on servers, there are severe lags. Please optimize the hopper algorithms. Many servers change the behavior of the hoppers. TickSpeed Item transfer rate etc. The problem with this is that this destroys redstone machines. such as checking a correct item to open a door, for example. Or to sort items automatically. It would be cool if you put in a block that gives a redstone signal as soon as you put in the correct item. This would enable servers to optimize hoppers and still offer the option of checking items for correctness. For a door lock, for example.