Need for speed

[Berni44]

On Thursday, 1 April 2021 at 16:52:17 UTC, Nestor wrote:
> I was hoping to beat my dear Python and get similar results to 
> Go, but that is not the case neither using rdmd nor running the 
> executable generated by dmd. I am getting values between 
> 350-380 ms, and 81ms in Python.

Try using ldc2 instead of dmd:

```
ldc2 -O3 -release -boundscheck=off -flto=full 
-defaultlib=phobos2-ldc-lto,druntime-ldc-lto speed.d
```

should produce much better results.