Message passing between threads: Java 4 times faster than D

Jacob Carlborg doob at
Fri Feb 10 05:59:10 PST 2012

On 2012-02-10 14:54, Oliver Plow wrote:
>>> I wonder how much it helps to just optimize the GC a little.  How much
>>> does the performance gap close when you use DMD 2.058 beta instead of
>>> 2.057?  This upcoming release has several new garbage collector
>>> optimizations.  If the GC is the bottleneck, then it's not surprising
> Is there a way to "turn off" the GC, e.g. a compiler switch to set the heap size to a large number so that the GC is likely not to set in? I searched through this page: But couldn't find anything helpful. Then you could measure the thing with GC "turned off" to see whether the GC is the problem or not.
> -- Oliver

There's a stub implementation of the GC which uses malloc, IIRC. Try 
using that one at link time.

/Jacob Carlborg

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