Java Performance On Ubuntu Vs. Windows Vista
Henckle writes "Phoronix did a comparison of the Java performance between Ubuntu and Windows Vista. They tested both Java and OpenJDK on Ubuntu 8.10 and Java on Windows Vista Premium SP1, all with stock configurations. To no-one's surprise, Ubuntu was faster in a majority of the tests. The two OSs were similar in ray-tracing, and Vista was faster at Java OpenGL due to shortcomings with the Linux graphics driver."
Yes. Sunflow is one example. I did my own tests, java vs c++ (almoste the same code) and java was only about 1.3 times slower.
Extreme Programming - Redundant Array of Inexpensive Developers
You shouldn't be. .net.
Most java development these days takes place on the server side. Linux is has a large precentage of the server market. Then you must know that Sun is a Unix company. They push Solaris and java on Solaris. Solaris is a lot more like Linux than Windows. The the final piece is that in the Windows server market Java shares space with
So as far as the amount of attention I would say that Solaris/Linux/Unix gets just as much attention as Windows does.
See my blog http://ilovecookes.blogspot.com/ for light hearted technical information.