32x apps in XP 64x

[Guest LifeOnMars]

Hi there

Do 32bit apps, such as a password cracking applications run at a 64bit

'mode' when installed and run in a 64bit environment?

 

I have a dual core 2GH laptop and have installed Windows XP Pro 64bit on it

to speed up the password crunching process but the application is not

specifically designed for a 64bit environment. Am I clutching on straws?

 

Thank you

LifeOnMars

[Guest Charlie Russel - MVP]

Re: 32x apps in XP 64x

 

You won't see any improvement, I'm afraid. 32-bit applications run in the

WOW64 layer, which is a very thin shim that allows 32-bit programs to work

in a 64-bit OS. Some operations do see some improvement from the 64-bit OS

(I/O operations, mostly, IME), but others see a slight slowdown, which tends

to balance things out. Overall, I'd say there's no difference in speed,

UNLESS the application is memory bound, and the availability of a larger

virtual memory address space (4GB per process, instead of 3GB per process)

is able to be used.

 

--

Charlie.

http://msmvps.com/xperts64

http://mvp.support.microsoft.com/profile/charlie.russel

 

 

"LifeOnMars" <LifeOnMars@discussions.microsoft.com> wrote in message

news:5C575396-D059-49F3-A141-B9D0B2B0324E@microsoft.com...

> Hi there

> Do 32bit apps, such as a password cracking applications run at a 64bit

> 'mode' when installed and run in a 64bit environment?

>

> I have a dual core 2GH laptop and have installed Windows XP Pro 64bit on

> it

> to speed up the password crunching process but the application is not

> specifically designed for a 64bit environment. Am I clutching on straws?

>

> Thank you

> LifeOnMars

[Guest Shehbaz Afzal]

Re: 32x apps in XP 64x

 

Thank you Charlie, all makes sense now, I can confirm the app is running at a

slightly higher speed but that may well be because of the physical and

virtual memory available. The Task Manager shows both processors 50%!

 

Many thanks

--

Shehbaz Afzal, MCP Windows XP

 

 

"Charlie Russel - MVP" wrote:

> You won't see any improvement, I'm afraid. 32-bit applications run in the

> WOW64 layer, which is a very thin shim that allows 32-bit programs to work

> in a 64-bit OS. Some operations do see some improvement from the 64-bit OS

> (I/O operations, mostly, IME), but others see a slight slowdown, which tends

> to balance things out. Overall, I'd say there's no difference in speed,

> UNLESS the application is memory bound, and the availability of a larger

> virtual memory address space (4GB per process, instead of 3GB per process)

> is able to be used.

>

> --

> Charlie.

> http://msmvps.com/xperts64

> http://mvp.support.microsoft.com/profile/charlie.russel

>

>

> "LifeOnMars" <LifeOnMars@discussions.microsoft.com> wrote in message

> news:5C575396-D059-49F3-A141-B9D0B2B0324E@microsoft.com...

> > Hi there

> > Do 32bit apps, such as a password cracking applications run at a 64bit

> > 'mode' when installed and run in a 64bit environment?

> >

> > I have a dual core 2GH laptop and have installed Windows XP Pro 64bit on

> > it

> > to speed up the password crunching process but the application is not

> > specifically designed for a 64bit environment. Am I clutching on straws?

> >

> > Thank you

> > LifeOnMars

>

>

[Guest Shehbaz Afzal]

Re: 32x apps in XP 64x

 

Thank you Charlie. There is no improvement in app performance well not worth

noticing anyway. But something worth mentioning I thought was that Task

Manager shows both processors at 50%

 

Many thanks

--

Shehbaz Afzal, MCP Windows XP

 

 

"Charlie Russel - MVP" wrote:

> You won't see any improvement, I'm afraid. 32-bit applications run in the

> WOW64 layer, which is a very thin shim that allows 32-bit programs to work

> in a 64-bit OS. Some operations do see some improvement from the 64-bit OS

> (I/O operations, mostly, IME), but others see a slight slowdown, which tends

> to balance things out. Overall, I'd say there's no difference in speed,

> UNLESS the application is memory bound, and the availability of a larger

> virtual memory address space (4GB per process, instead of 3GB per process)

> is able to be used.

>

> --

> Charlie.

> http://msmvps.com/xperts64

> http://mvp.support.microsoft.com/profile/charlie.russel

>

>

> "LifeOnMars" <LifeOnMars@discussions.microsoft.com> wrote in message

> news:5C575396-D059-49F3-A141-B9D0B2B0324E@microsoft.com...

> > Hi there

> > Do 32bit apps, such as a password cracking applications run at a 64bit

> > 'mode' when installed and run in a 64bit environment?

> >

> > I have a dual core 2GH laptop and have installed Windows XP Pro 64bit on

> > it

> > to speed up the password crunching process but the application is not

> > specifically designed for a 64bit environment. Am I clutching on straws?

> >

> > Thank you

> > LifeOnMars

>

>