extremely expensive No. CSPRNGs can be pretty competitive these days: https://github.com/google/randen https://github.com/google/randen Yes, in some cases tha

extremely expensive No. CSPRNGs can be pretty competitive these days: https://github.com/google/randen https://github.com/google/randen Yes, in some cases that’s still (a bit) too slow or too much code but best to benchmark first.