This is an alpha version so dont expect greatness but it works pretty well. So for all of you that cant run 1.8 so well here is a bit of a boost. http://optifine.net/tmp/OptiFine_1.8.0_HD_U_A2.jar
There is a new optifine out for 1.8 called Optifine_1.8.0_HD_U_A4. The mirror download is the best. If you have any problems installing it, feel free to message me on here or on skyblock if im on