On Tue, Jun 2, 2009 at 8:40 PM, Diwaker Gupta <diwa...@floatingsun.net> wrote: > I've just started to play around with D, and I'm hoping someone can clarify > this. I wrote a very simple program that just allocates lots of objects, in > order to benchmark the garbage collector in D. For comparison, I wrote the > programs in C++, Java and D: > C++: http://gist.github.com/122708 > Java: http://gist.github.com/122709 > D: http://gist.github.com/121790 > > With an iteration count of 99999999, I get the following numbers: > JAVA: > 0:01.60 elapsed, 1.25 user, 0.28 system > C++: > 0:04.99 elapsed, 4.97 user, 0.00 system > D: > 0:25.28 elapsed, 25.22 user, 0.00 system > > As you can see, D is abysmally slow compared to C++ and Java. This is using > the GNU gdc compiler. I'm hoping the community can give me some insight on > what is going on.
D's GC is not nearly as well-developed as that of Java's, and its performance is not that stellar. Sorry, but you are not the first to discover this by any stretch of the imagination. (On a side note, I have a feeling you and bearophile will get on famously.) Also, benchmarking a GC against manual memory management doesn't do much for you. It's apples and oranges. Though it is funny to see how badly Java beats C++ there.
