I doubt its the emulator since other people can play the game at decent speeds, the problem must be your videocard , have you tried other opengl games/programs on this card? (not directx)
make sure you are using the latest build from here
http://buildbot.orphis.net/jpcsp/
as for Java, Jpcsp will always use Java., pcsp uses c++ but its still not as compatible as Jpcsp yet.
make sure you are using the latest build from here
http://buildbot.orphis.net/jpcsp/
as for Java, Jpcsp will always use Java., pcsp uses c++ but its still not as compatible as Jpcsp yet.
Try Out JPCSP Launcher v1.8.0.4 | How to post a log