topN using a heap

[deadalnix via Digitalmars-d]

On Monday, 18 January 2016 at 23:49:36 UTC, Andrei Alexandrescu 
wrote:
> unpredictableSeed uses the system clock as a source of 
> randomness, so we're good there. -- Andrei

I got problem with that even when crytographically secure 
randomness wasn't needed more than once. A specific case included 
adding jitter on some timeout to avoid all hosts to expire at the 
same time, and used mersenne twister with a pseudo random seed. 
There still were way too many hosts ending up with the same 
timeout.

System time is not enough.