Assuming there is bytes in the system's entropy pool, you can also skip the scrambling step, though I don't know what overhead consuming these bytes entails compared to a standard PRNG. Then the biggest part of it is making the raw bytes into float. I'm not sure - could you take 4 random bytes, grab the unsafe pointer and cast back to float32?
On Tuesday, 26 February 2019 00:16:20 UTC+1, Rob 'Commander' Pike wrote: > > If you don't need precision, just generate ints and scale them. > > -rob > > > On Tue, Feb 26, 2019 at 9:39 AM DrGo <salah....@gmail.com <javascript:>> > wrote: > >> Thanks Ian, >> The std lib float32 is slow for my purpose. In my benchmarking it is >> actually slower than the float64. But I don’t even need float16 precision. >> I am working on implementing othe alias method for sampling from a fixed >> freq dist with possibly thousands of arbitrary values. So the rng doesn’t >> need to be precise or high quality because of rounding eg a rn of .67895 >> might end up selecting the same arbitrary value as .67091 or even .65!! >> https://en.m.wikipedia.org/wiki/Alias_method >> >> -- >> You received this message because you are subscribed to the Google Groups >> "golang-nuts" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to golang-nuts...@googlegroups.com <javascript:>. >> For more options, visit https://groups.google.com/d/optout. >> > -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
