Play music from Rekordbox USB in other Rekordbox on other PC is very slow!

I use Rekordbox to organise my whole music collection and export it to USB for use on Pioneer Rekordbox CD Players as a DJ.

Sometimes people ask me if I can provide some good music for them at a private party for the background. I can't give my USB stick alone, because then I don't have my playlist mapping from Rekordbox. So I install Rekordbox on their PC and load in my USB (so no CDJs, only Laptop). Now people can easily look in my music collection.

I see my USB under the "Devices" tab and I can play music from my own playlists (just like in the CDJ 2000).

The problem:
- It's very slow when scrolling, clicking, searching etc.

I think it is not a hardware problem! I use a MacBook Pro with SSD and USB 3.0. Also my USB is a 3.0 stick with 128GB (Read 100 MB/s, Write 15 MB/s).

Is this a Rekordbox problem? Are their any plans to speed up this functionality? Or is their still something wrong with my hardware?

Many thanks,
Jim Craane