Today on mobile, device manufacturers' GL implementations are notoriously awful: https://dolphin-emu.org/blog/2013/09/26/dolphin-emulator-and-opengl-drivers-ha

Today on mobile, device manufacturers' GL implementations are notoriously awful: https://dolphin-emu.org/blog/2013/09/26/dolphin-emulator-and-opengl-drivers-hall-fameshame/ https://dolphin-emu.org/blog/2013/09/26/dolphin-emulator-and... It sounds like Apple is doing well by comparison, but I don't deal with this stuff myself at present, so I'm not sure.