Why Java (server VM) is faster than D?

[John Colvin via Digitalmars-d]

On Monday, 3 August 2015 at 16:27:39 UTC, aki wrote:
> When I was trying to port some Java program to D,
> I noticed Java is faster than D.
> I made a simple bench mark test as follows.
> Then, I was shocked with the result.
>
> [...]

What compilation flags?