Fastest rolling basslines??

[Cadillac_Mike]

I was just playing along to "Dust my Broom" and that really seems to be pushing to limits of a high tempo roll lol.

 

[Michedelic]

I was just playing along to "Dust my Broom" and that really seems to be pushing to limits of a high tempo roll lol.

Limits? Not really. I've heard Dusty Hill do that sort of thing countless times with ZZ Top, let alone Tommy Shannon(who played with JW way back when)with SRV. I'm not sure what you mean by roll, what I hear is what I've always heard referred to as a shuffle.
Now, if you want breakneck playing, albeit in walking format, try this…

 

[Watchootognbout]

High energy bass shuffle at 0:52