Thats not completly true, last time I tried some of best c++ version from http://benchmarksgame.alioth.debian.org/. I was able to write much idiomatic D code which was faster than c++ witch use some specific libraries and so on. So my experience is that D is same or faster than C++

On Tue, Jan 30, 2018 at 10:26 PM, Ola Fosheim Grøstad via Digitalmars-d <digitalmars-d@puremagic.com> wrote:
On Tuesday, 30 January 2018 at 21:02:13 UTC, H. S. Teoh wrote:
On Tue, Jan 30, 2018 at 03:45:44PM -0500, Andrei Alexandrescu via Digitalmars-d wrote:
https://www.quora.com/Why-hasnt-D-started-to-replace-C++
[...]

I actually agree with all of his points, except one: C++'s "enormous performance advantage"?!  Is he being serious?  Or is his view biased by dmd's, erm, shall we say, "suboptimal" optimizer?

Well, I understand what you mean, but there are more performance related options for C++ than for any other language at the moment. I don't use them, most people don't, but they exist. So for people that care a lot about throughput there basically is no other "complete" alternative...