Vs. Alioth binary-trees

[dsimcha]

== Quote from The Anh Tran (trtheanh at gmail.com)'s article
> Hi,
> Could you measure spinlock with this bench?
> http://shootout.alioth.debian.org/u32q/benchmark.php?test=binarytrees&lang=all
> Thanks.

I tried to reply to your post last night with my modified gcx.d, but apparently
posting attachments of that size (~80kb) silently fails.

There is no multithreaded implementation of the binary trees benchmark for D that
I was able to find.  As far as the single-threaded version, spinlocks would make
absolutely no difference because the druntime GC uses thread_needLock() to avoid
any kind of lock on single-threaded code.

If you or anyone else wants to play around w/ my modified gcx.d code and try it
under different use cases, I've posted it to http://cis.jhu.edu/~dsimcha/gcx.d.