Confusion about `Random`

[Siarhei Siamashka]

On Saturday, 24 December 2022 at 16:16:17 UTC, jwatson-CO-edu 
wrote:
> Then it became clear that the parser was replacing calls to 
> `rand` with
> a number, which was displayed repeatedly when a loop was 
> evaluated.

Sounds like a case of https://xkcd.com/221/

BTW, you don't need to explicitly initialize unpredictableSeed, 
because that's how it is already configured dby efault. Setting 
the seed is useful if you are interested in a specific PRNG 
algorithm with a specific seed to produce a predictable 
deterministic pattern.

Another thing is that the current implementation of `std.random` 
in Phobos is extremely slow and with some tweaks it [can be up to 
3x-6x times 
faster](https://codeforces.com/blog/entry/99292#comment-881097). 
There's a more advanced 
[mir-random](https://code.dlang.org/packages/mir-random) 
third-party dub package, but I'm not sure whether they have any 
plans to backport all of their optimizations to Phobos (or 
whether such contribution would be accepted).