Well, don't read too much into it. Here is the Java source for binary-trees, which is 6x faster than c#. http://shootout.alioth.debian.org/u64q/program.php?tes

Well, don't read too much into it. Here is the Java source for binary-trees, which is 6x faster than c#. http://shootout.alioth.debian.org/u64q/program.php?test=binarytrees&lang=java&id=1 http://shootout.alioth.debian.org/u64q/program.php?test=bina... C#: http://shootout.alioth.debian.org/u64q/program.php?test=binarytrees&lang=csharp&id=2 http://shootout.alioth.debian.org/u64q/program.php?test=bina... Notice that the Java code multi-threaded, while the C# version is single-threaded. And the Q6600 being used there has 4 cores.