Lag and freezes No crash

in the new snapshots Minecraft would act Very laggy During play time in an already created world and would freeze when in settings/options not crash or (not responding) just freeze and be still.
NOTE i tried to film the menu locking on one option and freeze but i noticed if i play while recording it wont do this So im lead to think it is an error with OPEN GL am i close to the truth?
any way i cant play while recording o only have 4 cores so what could the issue be Please fix or let me know C=
i really want new snapshots