Hi, Just got the 12" Macbook 1.3ghz 256gb today and turned on Filevault. I've never had it turned on on any of my machines. My previous machine was a early 2011 2.3 Core i5 with 16gb ram and samsung ssd. I noticed some stuttering while running chrome as well as switching apps. I am using the macbook to process 16-36 megapixel RAW photo images using Capture 1. I need max speed and I was wondering if Filevault is worth the processor speed hit. Are there any figures on how much of real world impact Filevault has? This machine is already slower and I want to get out every ounce of perfomance from the CPU. I am willing to turn it off as I can turn on Firmware password.