How? AFAIK it is about wrong number of core and threads for AMD cpus. But those tests are runining on intel cpus

On Sat, Jul 20, 2019 at 7:10 PM Andre Pany via Digitalmars-d <digitalmars-d@puremagic.com> wrote:
On Friday, 12 July 2019 at 07:47:23 UTC, Sönke Ludwig wrote:
> Am 12.07.2019 um 00:33 schrieb Daniel Kozak:
>> [...]
>
> The issue with InterfaceProxy is definitely true, this has a
> considerable performance hit and the new vibe-http module will
> get rid of that. However, even with InterfaceProxy, the
> performance is still well within the same order of magnitude.
>
> [...]

In recent dmd a bug was fixed which maybe is related to your
scaling observation:

https://issues.dlang.org/show_bug.cgi?id=19861

Kind regards
Andre