Diwaker Gupta 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.
Thanks,
Diwaker
After porting the D version to tango:
D: 6.282s (ldmd -O5 -inline -release -L-s -singleobj gctest.d)
C++: 4.435s (g++ -O5 gctest.d)
This is on a C2D 2.2Ghz, 2GB RAM, Linux x86-64. I don't have java
installed, so can't test that. Maybe if you're planning to use the GC a
lot you should consider using tango?
