To have a fps counter on screen

Put this in Config.prc:

show-frame-rate-meter #t
# or (before importing DirectStart)
from pandac.PandaModules import loadPrcFileData
loadPrcFileData('', 'show-frame-rate-meter #t' )

Alternatively, call this at runtime:

base.setFrameRateMeter(True)

To disable vsync (which caps your framerate to your monitor's refresh rate, allowing it to go past ~60 FPS), put this in Config.prc:

sync-video #f
# or (before importing DirectStart)
from pandac.PandaModules import loadPrcFileData
loadPrcFileData('', 'sync-video #f' )