This is great, thank you.
I do practice playing random stuff fast sometimes but I find that it ends up being just stuff I know, and usually just around a key center. So I can play all sorts of things pretty fast around a static chord. So a modal tune like So What or Footprints is usually ok, but a tune with more complex changes, let’s say Yardbird Suite, can be a challenge. If I prepare in advance I can analyse the tune and divide it into key center chunks, but on the spot at a jam without any prep it’s tricky.
I really like the thinking behind the Wooten exercise you mentioned, there is a suggestion there that nailing the time and feel with conviction is much more important than perfectly following changes. I’m going to play around with this today.
In terms of slowing stuff down and transcribing- yep, I do this a lot already, and yeah it definitely does give me lots of options and ideas, but I find that at fast speeds, the technical aspects of the actual instrument come into play quite a lot. So something that can be played really fast on a saxophone might be almost impossible on bass. (I don’t have Jaco’s giant fingers unfortunately..). If I want to learn fast chops on electric bass, I find transcribing electric bass the most helpful, but part of the problem is that that there aren’t too many examples of jazz soloing over standards on electric bass in existence. I know about guys like Jeff Andrews, Dario Deidda etc but compared to the ‘usual’ jazz instruments, electric bass recordings of jazz standards are pretty rare. I get lots of good info from upright, Paul Chambers solos for example, but even those can be tricky to adapt to speedy tunes on electric sometimes.
I guess ultimately the answer is the same as ever - listen, transcribe, play and practice a lot..