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Re: Java VM specifics on MacOSX

I agree that Java VM performance on the Mac is very disappointing compared to Windows or Linux. If I need decent Java performance I use the server VM on Linux or if that's not enough put the number crunching into C or Objective C accessible through JNI on my G5. Don't forget that the G5 has the best floating point performance of any desktop chip and that IBM's xlc compiler wipes the floor versus gcc.

I think it's probably a resource issue at Apple. Rightly I guess they target client apps first since this is undoubtedly the bigger audience. But then they offer JBoss, a server app by any definition without a server JVM with aggressive JIT compilation, inlining, optimisation etc. which is very disappointing. This may change over time of course. If you look at what they have achieved with OS X in under four years it's remarkable. I guess one problem with Java is just keeping up with new releases and supporting a server VM would probably need double the men and horses. Still, Steve could take a small pay cut and use the proceeds to transform Apple Java overnight. You have to think different if you want to be insanely great!

John


On 24 Apr 2004, at 12:04, Andrew Larder wrote:

Hi,

Does anyone know why MacOSX only comes with a client VM, and whether Apple
ever plan to support a server VM? The reason I ask is related to some highly
numerical code I am developing, which doesn't perform very well on the G4 or
G5 that I have tested it on (in fact it runs the same percentage slower than
C++ code, as the client VM on Intel does. This isn't good enough for my
purposes).

Please note this is not an attempt to start yet another benchmarking debate,
nor to criticise the Mac platform, but an honest plea for some information
that I cannot find anywhere else.

Cheers,
Andy.
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References: 
 >Java VM specifics on MacOSX (From: "Andrew Larder" <email@hidden>)



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