[PD-dev] devel_0_39 ? devel_0_40 ?

[chris clepper]

On 7/21/07, chris clepper <cgclepper at gmail.com> wrote:
>
> On 7/21/07, Miller Puckette <mpuckett at imusic1.ucsd.edu> wrote:
> >
> > Just as
> > a teaser, I tried running the same patch as 32-bit and 64-bit programs
> > on
> > my 64-bit machine, hoping to find the 32-bit version so much faster that
> > I
> > could just forget optimizing the 64 bit version entirely.  But I found
> > the
> > 64-bit one 33% faster than the 32-bit one for the particular patch I
> > tried.
> > So 64-bit compatibility has to be taken seriously!
>
>
> If I had to hazard a guess that speedup is due to the compiler.  The 64
> bit CPUs are all quite recent and the assumptions about what the fast paths
> are a much smaller and generally much more efficient set than the 32 bit
> options. No doubt some of that comes from the gamesmanship involved in
> rigging and hyping scores on the baleful SPEC test suite.
>
>
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