A lot of modern games run slow because devs are using common 2D/3D engines which focus on cross-compatibility and ease of use over speed. Testing in a lot of b

A lot of modern games run slow because devs are using common 2D/3D engines which focus on cross-compatibility and ease of use over speed. Testing in a lot of basic 2D engines also focuses on low performance, e.g. for an RPG where you'll have a dozen sprites moving around, instead of say 500 ships/weapon shots in a shmup.