I have no lag or hardly any. I just played around a little with the settings. If I play fft too long my phone gets hot and PSP app crashes. The photo shows some of my games.
Sent from my Nexus 5 using xda app-developers app
Some games take more playing with settings than others. One other thing it depends on the quality of the ROM. I had two versions of Armored Core. 1 version had some graphical errors and the other one was clean. Download the PC version just to make sure your roms work well.
XDA Developers was founded by developers, for developers. It is now a valuable resource for people who want to make the most of their mobile devices, from customizing the look and feel to adding new functionality. Are you a developer?