I’ve got a beta of Haiku. It can sometimes lag. Why Haiku lags sometimes?
Haiku should run even with lower hardware preferences.
It would be helpful, if you post more details about your machine.
CPU, RAM, SSD/HDD etc.
It’s not just you. The bug has been long fixed in the nightly builds but beta3 isn’t out yet.
Mouse lag sometimes, since (unsure, not to blame you) your appserver changes.
Sadly i havnt found any way to reproduce it yet.