Message passing between threads: Java 4 times faster than D

[mw]

On Thursday, 9 February 2012 at 09:09:24 UTC, Nicolae Mihalache 
wrote:
> Hello,
>
> I'm a complete newbie in D and trying to compare with Java. I 
> implemented  a simple test for measuring the throughput in 
> message passing between threads. I see that Java can pass about 
> 4mil messages/sec while D only achieves 1mil/sec. I thought 
> that D should be faster.
>
> The messages are simply integers (which are converted to 
> Integer in Java).
>
> The two programs are attached. I tried compiling the D version 
> with both dmd and gdc and various optimization flags.

I just tried the attached program, D is still 3~4 times slower 
than the Java version.

Have we made any improvement on the message passing between 
threads since 2012?

Or is there any new way to improve the D verson?

Thanks.