SUPER LOW FPS WITH 1.8! FREEZES EVERY 3 SECONDS

Ever since 1.8 has been released I have been unable to play at all. I will log in, FPS will work its way up to around 36 and then freeze for a few seconds and then drop down to about 3 FPS. I've tried upgrading to Java 8 version 20, lowering the video quality etc. and nothing has worked. Before when I had 1.7.10 there was no lag and it was super smooth. Is anyone else having this same problem? It's extremely frustrating 😞