KaratsuFr thats true but on some systems they are very poor not because the hardware but the old version of emus .. for example ps2 emu on pc is on 5.0 and on batocera i think is 3.7 .. that is why on batocera is not the same like windows. citra core its based from citra emulator , now citra emulator on windows runs all my games i have on my HDD and on batocera citra core is very poor .. just 2d games running well and 3d games above 1 gb size are geting isues . i dont know how aktivate fps counter on batocera but i am sure is runnig full speed almost ps2,gamecube games ,some ps2 games get some usies because the early versioon of emu used here. 3ds is very soon for test more game, this core needs a new update . if theyre implement canary.citra core on the next batocera version it will be bether ..
POKE - yes internal resolution on emus script .but on ps2 some games are slow and other ones good playable .on gamecube 1080 was running like a charm , other cores 2 configured over retroarch or config files .