Re: [platform-swt-dev] Why Java Visual Applications is very slow on Mac

[Mike Wilson <Mike_Wilson@xxxxxxxxxx>]

VM's running in "pure" 64-bit mode need to move twice as much data per pointer, which would tend to make them slower; this is offset somewhat on x86 machines by having more registers to work with in the JIT, and some VMs use compact representations for pointers that further increase performance. In any case, your program may or may not be faster, depending on what it does. The biggest benefit of 64-bit VMs is the *size* of program they can run.

McQ.

Márcio Souza ---14/07/2009 18:12:42---But, is Cocoa 64bits not better and faster ?

From:	Márcio Souza <marcioferreirass@xxxxxxxxx>
To:	"Eclipse Platform SWT component developers list." <platform-swt-dev@xxxxxxxxxxx>
Date:	14/07/2009 18:12
Subject:	Re: [platform-swt-dev] Why Java Visual Applications is very slow on Mac OS ?

---

But, is Cocoa 64bits not better and faster ?

2009/7/14 Eugene Ostroukhov <eostroukhov@xxxxxxxxx>

Can you try 32 bit version (it will only work with Java5)? I'm using it atm - seems fast.

On 15 Лип 2009, at 00:20, Márcio Souza wrote:

Hi.

I'm using Cocoa 64 version. My JVM is 6 64bits.
I do not felling this problem in other apps ( firefox, safari, Mail, XCode, Pages, TextMate ...)

For builds it is not slow, but the visual components (windows, menus, drag tabs ) it is.


2009/7/14 Eugene Ostroukhov <eostroukhov@xxxxxxxxx>
Marcio,
what do you mean by "slow"? I'm using Eclipse on Mac OS X for several years and I don't notice any perceivable performance improvement when I switch to Windows...

Are you a recent switcher? The "slowness" feeling could be the result of the bit different OS UI behavior. Do you have such feeling in other apps - i.e. browser? Do you see Java/Mac OS X slow on some computational tasks - like building.

Are you using Carbon or Cocoa version? Cocoa/64 version seems to need much more memory then 32 bit does.

Best regards,
Eugene

2009/7/12 Márcio Souza <marcioferreirass@xxxxxxxxx>
Hi everyone.

Why Eclipse, Netbeans and all java visual applications is very slow on Mac OS X ? (10.4, 10.5.x)

I have a macbook black 2.4, 2GB RAM and 250 HDD and when I lauch that`s applications on my Mac OS X 10.5.7, it`s slow during your execution. But, when I launch the same applications on the Windows XP on the same machine (boot camp), it`s much faster.

Why ? Mac is not a good plataform for java developers ?

I am a little frustrated. :-(

I appreciate any types of answers.

Thanks.



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