Hi All,
Putting the JIT aside for a moment, consider an arbitrary C/C++ application optimized for Xeon - will it run faster, unconditionally, on Itanium?
Describe "optimized for Xeon". What extensions are you referring to ? (and please don't say SIMD).
I guess that 'to get better performance on Itanium' this guy should get an optimized JVM *for* Itanium. In Java, performance varies dramatically depending on the JVM and JIT implementation.
I'm not sure what kinds of optimizations are available by different versions of the JRE. Most likely none. Even more likely that you don't really need them (if they are at all possible).
Just my $0.02: IBM's implementation of the JVM is *not* optimized for Itanium (and probably won't be). It is optimized, however, for other 64bit processors such as AMD64 and Power4/5.
That's a different kind of optimization. In any case, if you write your code properly and you run your program in the correct environment, Java math speed is comparable to native code. To all those people who believe that Java is a performance hogging monster, let me burst your bubble right here and now.
Eli
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