Note this application:
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* This app requires root! *
FPS Counter. Shows how many Frames Per Second (FPS) you are getting in a corner of your screen.
Now you have opportunity to see your framerate both in system and in apps/games. Test your device, compete with your friends.
NOTE: If app works partially (FPS freeze in games) try to set "Developer options" - "Disable HW overlays" option in system settings.