PPSSPP "Invalid address"

[[Unknown]]

On Windows, it should usually run well without drops. The default settings are generally pretty good. Texture Scaling may definitely cause frame drops, and you can reduce the resolution to see if it's just too hard on your GPU.

Enabling "Fast Memory (unstable)" will improve the speed, but may crash if something goes wrong in the emulation.

Specific to Android, you can try disabling Buffered Rendering. This will break some games, but it's typically more worth it on Android than Windows.

-[Unknown]