I am getting these issues with Rekordbox 5.22 and anything before it I experience slow browsing in performance mode. This does not happen with any other software with the same collections same hard drive. here is a video
I am posting this here because I want to see if any others have this issue as well.
System specs
Macbook Pro retina 13 inch mid 2015 8gb ram 2.7ghz I5 High Sierra latest
WD USB 3.0, 2 TB External.
https://www.youtube.com/watch?v=1XXbM5Bb_mM&t=1s
note I have been waiting a week with a ticket and for it to be resolved.
I bought Rekordbox dj and the plus pack back in Sept of 2017 and havent been able to use it yet in performance mode because of this issue.