Ok, I know that opengl is native when using java or c/c++. But as far as performance is concerned can there be made a case that opengl using c/c++ code vs java is faster? Once the VM starts and the opengl calls are made, I would think that it shouldn't be different. However, since with java the opengl has to be blipped onto some renderable surface, then it *could* be a bit slower running in java?? Is this any different than how a C/C++ application must render the gl?
Anyone have any information on this?
author and iconoclast
Calling the individual GL methods is always going to be slower because pushing data through the "JNI barrier" is slow. But if you call a bunch of methods to build a display list, and then call the display list multiple times, that extra time is amortized away very quickly.
AFAIK, in current Java/GL implementations there's no extra buffer copying or or anything like that.