On Sun, 16 Aug 2009, Arne Vajh?j wrote:
Tom Anderson wrote:
Zoinks. I'd suggest filing a bug report with Sun - that is a
substantial performance regression.
There are two good reasons for why that will not accomplish anything:
* the Java on MacOS X is Apple's responsibility not SUN's (the fact
that Apple is buying Java technology from SUN as the basis for
their Java does not mean that SUN has a responsibility for
Apple's end users)
True - it would be better to report this to Apple.
I would be quite surprised if the compiler in Apple's JVM was different
to Sun's; i don't see why Apple would invest engineering effort in
improving it, given that it took a huge effort to make it as good as it
is, and so would take a lot of expertise and work to make it better, and
Apple has no pressing business need for a java which is faster than
Sun's. But still, this is something that should be reported to Apple if
it can't be reproduced on non-Apple hardware.
* neither SUN nor Apple has claimed that there will not exist code
where the newer version perform worse than the old version (I don't
think any compiler vendor has done that - it happens frequently for
C compilers)
True, but entirely unimportant. Performance *is* a goal for Sun, and so
they are likely to find performance problems interesting. It might be
that the OP's code is so unusual that it isn't worth them bothering
with, but it might very well not be. Filing a bug report about it is
easy to do, so why not?