Hardware that I used a 16GB SanDisk flash drive: i7 4790, 20+ Gb ram, Asus maximus 7 MB, etc.
When running the live version of kali on the flash drive, everything runs very smoothly and quickly.
However, after successfully running the encrypted persistence on the same USB flash drive, everything becomes much slower, as in opening a terminal would take 2-3 seconds, and opening a browser would take more than 5 seconds.
Any ways I could speed things up, I would think once the volume is decrypted and mounted, speed should not be an issue, but it's not the case. I used the docs on kali for all the steps.