yeah, I used argon2 for my `signr` https://mleku.online/git/signr but its parameters are pretty hard core. Takes about 3 seconds on my ryzen 5 2021 laptop. About the same delay on my dm-crypt passwords (the grub unlock takes typically around 8 seconds).

I wrote a memory, cache and processor hard hash function for my work on parallelcoin. I designed it to do about 10 iterations per second, and that rate was pretty flat across several different CPUs, because it's based on very large integer long division.

Makes me think. I should use it in signr, add a config option and set the long division based one as default so if anyone's actually using it they don't get locked out of their keychain. A job for the weekend.

large integer long division is the hardest and least wide variation on all possible hardware. CPUs have 64 bits, and division circuitry takes up about 1/4 the die. ARM and GPUs can do it also, but GPUs have smaller die devoted to it and both require two cycles to process 64 bits.

I'm too busy on scratching out a living to be able to have the luxury of solving what I consider to be the big problems but maybe in a year or two I'll really have some freedom to play.