[Issue 15553] topN very inefficient [slower than sort, even for topN(0)] but should be O(n)

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=15553

--- Comment #1 from Timothee Cour <timothee.cour2 at gmail.com> ---
haven't profiled, but:
could uniform be slow
https://github.com/D-Programming-Language/phobos/commit/7291d2e47d4a7fb17565a7d7cd04ba8f893c1a27

not sure if those could help: #5514 

Maybe this is most relevant: [std.algorithm: implement deterministic topN]
https://issues.dlang.org/show_bug.cgi?id=12141


At the very least, it shouldn't be slower than sort

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