Message passing between threads: Java 4 times faster than D

Oliver Plow saxo123 at
Thu Feb 9 14:17:40 PST 2012

Hi Nicolae,

I don't know whether you are particularly interested in the case you presented. For performance comparison between D and other languages in general there is this article that I think is quite good:

It is allready quite old and stems from 2003. Would be interesting to see how the repport would like like today when the benchmarks were redone. As your example suggested these number crunching-oriented benchmarks as in this report are not always that meaningful for everday life performance issues.

Regards, Oliver

-------- Original-Nachricht --------
> Datum: Thu, 9 Feb 2012 10:06:40 +0100
> Von: Nicolae Mihalache <xpromache at>
> An: digitalmars-d at
> Betreff: Message passing between threads: Java 4 times faster than D

> 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.
> mache

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