x64 speed

[Robin Becker]

Paul Rubin wrote:
> Robin Becker <robin at reportlab.com> writes:
>> so it looks like the vmware emulated system is much faster. Is it the
>> x64 working faster at its design sizes or perhaps the compiler or
>> could it be the vmware system caching all writes etc etc? For the red
>> hat x64 build the only special configuration was to use ucs2
> 
> You have to control all these variables separately in order to know.
> But, 64 bit code is in general faster than 32 bit code when properly
> compiled: more cpu registers, wider moves when copying large blocks of
> data, floating point registers instead of the legacy stack-oriented
> FPU, etc.

I tried looking at the cpu usage whilst running these and by eye it 
seemed that the host system was running more parallel stuff than the 
vmware vm.
-- 
Robin Becker