F 15. 64 bit versus 32 bit.

[Nat Gross]

On Tue, May 24, 2011 at 4:44 PM, Fernando Cassia <fcassia at gmail.com> wrote:
> On Tue, May 24, 2011 at 17:40, Jerry Feldman <gaf at blu.org> wrote:
>> The bottom line here is you can't make a blanket statement
>> that 64-bit code is slower. And if you have a decent optimizing
>> compiler, your performance could improve.
>
> I don´t make any blanket statement. Sun/Oracle´s FAQ does say there´s
> a 0-15% performance hit due to bigger code.
>
> You´re right, there are other very valid reasons to use 64-bit code
> and 64-bit VMs.
>
> But in some instances 32-bit VMs are faster.
> FC

Oracle is now giving away JRockit. From a little googling, it seems it
does not suffer any 64 bit problems. For the situations that I need
that 15% I can use JRockit. Being a developer, I need to test it
anyhow.
-- nat