This feels like a solution looking for a problem. I have a couple hundred brew packages on my system and I’ve never sat there thinking “If this was only 2 seconds faster…” while doing an update. I’m sure the Homebrew folks could mine this for a few ideas of how to further optimize brew, but I don’t think I’ll be adopting it anytime soon. Compatibility is more important than speed in this case.
Agreed on horses for courses. Different people have different tolerances. And yea, all things being equal, faster is better, but they are almost never equal. If you don’t mind me asking, what does “too slow” mean for you in this context? Do you have a particularly complex setup? And what do you use now as an alternative and how has that impacted the update speed?