when i play minecraft i get lag spikes when i walk past certain areas. the size of these areas is normally like 6 or 7 squares. i run minecraft using optifine around 25fps. without optifine its like 6fps. i would like to know is it normal to have lag spikes in the same area everytime i walk in that area and its more then one area. i have restarted on multiple worlds and these lag spots are constantly popping up. is there anything i can do to get rid of them?