Why is this D code slower than C++?

[Bradley Smith]

The Java implementation is also faster.

         time     factor   memory
   dmc    5 sec    1.0      5 MB
   java   8 sec    1.6     72 MB  (Java 1.6.0 -server)
   dmd    9 sec    1.8      5 MB
   java  19 sec    3.8     19 MB  (Java 1.6.0 -client)

However, Java uses much more memory.

All three implementations are in the attached zip.

Thanks,
   Bradley

-------------- next part --------------
A non-text attachment was scrubbed...
Name: raytracer3_cpp_d_java.zip
Type: application/x-zip-compressed
Size: 31620 bytes
Desc: not available
Url : http://lists.puremagic.com/pipermail/digitalmars-d-learn/attachments/20070121/69d6df56/attachment-0001.bin