Message passing between threads: Java 4 times faster than D

[Jacob Carlborg]

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: http://www.d-programming-language.org/dmd-windows.html#switches 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.

https://github.com/D-Programming-Language/druntime/blob/master/src/gcstub/gc.d

-- 
/Jacob Carlborg