jav...@javadesktop.org wrote:
While profiling some code that resizes images I discovered that ~94% of the
code's time is spent in sun.java2d.loops.TransformHelper.Transform(MaskBlit,
SurfaceData, SurfaceData, Composite, Region, AffineTransform, int, int, int,
int, int, int, int, int, int, int[], int, int). A native method. Since I have
the source I started reading through the C code of this method. Eventually I
arrived at line 428 and read the following comment:
/* Note that on x86 Linux the choice of best algorithm varies
* depending on the compiler optimization and the processor type.
* Currently, the sun/awt x86 Linux builds are not optimized so
* all the variations produce mediocre performance.
* For now we will use the choice that works best for the Windows
* build until the (lack of) optimization issues on Linux are resolved.
*/
Since this code will be deployed on x86 Linux and it's also the platform I'm
developing on I would like to know how do I best recompile the code so as to
maximize its performance on x86 Linux?
This may be an obsolete comment. I think we had since enabled optimizations
for linux binaries (it was a bug that they weren't enabled).
Dmitri
BTW, I'm running:
java version "1.6.0_12"
Java(TM) SE Runtime Environment (build 1.6.0_12-b04)
Java HotSpot(TM) Server VM (build 11.2-b01, mixed mode)
Thank you.
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