I recently did some tests with the PSM port of monogame and everything is working fine (including my engine and my game). The problem is it’s extremly slow ! Monogame seems to start lagging after 400 draw calls. Sony Spritebatch demo supports 4096 sprites without even a frame drop. I don’t understand why monogame is so laggy. I want to help but if someone can explain me what is actually wrong, it would be helpful.