topN using a heap

[Ivan Kazmenko via Digitalmars-d]

On Monday, 18 January 2016 at 12:00:10 UTC, Ivan Kazmenko wrote:
> Here goes the test which shows quadratic behavior for the new 
> version:
> http://dpaste.dzfl.pl/e4b3bc26c3cf
> (dpaste kills the slow code before it completes the task)

Correction: this is the result of removing a uniform call in pull 
3921.  Since we are supposed to discuss the improvements related 
to pull 3934 here, I created a separate entry for the issue: 
https://issues.dlang.org/show_bug.cgi?id=15583.