The faster you get this type of music memorized, the better - probably mentioned this before.
Many times I'll use my phone to record even just part of a YouTube performance - right off my laptop screen, so I can loop it.
Listening over & over helps me memorize.
Some say try to play up to speed as soon as possible, because the finger/hand movements that are ingrained are different at higher speed.
But, if you are not planning to play in a session with others - then speed doesn't matter.
So, I have been working on my Barlow Knife on the cello. It is a lot of fun. I thought I was doing pretty good. Then I saw a video of a fiddler playing it. Um ...
My Barlow Knife will not get to that speed. My Barlow Knife Is a lot slower. I am finding that I can see where some little touches of flair could be added after I smooth it out. i keep wanting to do that now, but I need to smooth it out and memorize it first so I can prepare for the next few notes better, If I can memorize it, which I almost have, I can work on the bowing because I know which note is coming next.
It is fun, though.
Sounds like youre enjoying it which is what its about!