[throwawayaway]

Excellent response! I have a program that spends 10% of it's time in vfprintf for string processing, and I really think the program should not be spending that much time/any time there. I looked at the libc6 vfprintf implementation and it's pretty esoteric looking stuff. It might be worth my time using your library or something similar to swap it out.

[justincormack]

Musl has the benefit of being very readable, and you can just use bits of code if you like due to the license.