Code runtime

[Donald Drumpf via Digitalmars-d]

On Sunday, 5 June 2016 at 21:52:20 UTC, Ausprobierer wrote:
> I've written this simple piece of code:
>
> [CODE]
> import std.algorithm;
> import std.array;
> import std.conv;
> import std.datetime;
> import std.parallelism;
> import std.range;
> import std.stdio;
> import core.atomic;
> import core.thread;
>
> [...]

How many times did you run each? A single run isn't ever really 
useful. Also, not sure if this would account for the drastic 
difference, but declare long Z[] in global scope over in local 
scope might have some impact.

If I wrote this, it would be faster, I guarantee it.