I have Kali installed on a PNY 64 GB USB 2.0 thumb drive. I set up persistence using the instructions on kali.org. Works as advertised, but when I boot to it using persistence it is sluggish as heck. apt-get update, apt-get upgrad, launching iceweasel, all very noticbly slower. If I shutdown and reboot into the live USB without persistence the response time is greatly improved. Thinking it might have something to do with the 64GB capacity, I repeated the process using a 16 GB USB 2.0 thumb drive. When booting with persistence it still seems sluggish though maybe not as bad as the 64 GB thumb drive.

Is this normal behavior when running persistence? Anyone else seeing this?