x64 speed
Diez B. Roggisch
deets at nospam.web.de
Tue Feb 3 15:27:48 EST 2009
Robin Becker schrieb:
> Whilst doing some portability testing with reportlab I noticed a strange
> speedup for our unittest suite with python2.5
>
> host win32 xp3 unittest time=42.2 seconds
> vmware RHEL x64 unittest time=30.9 seconds
>
> 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
>
> I know that the VT bit stuff has made virtualization much better, but
> this seems a bit weird.
AFAIK some VMs have difficulties with timers. For example, my
virtualized KDE has that jumping icon when starting a program - and
that's *much* faster jumping inside VBox :)
So - are you sure it *is* faster?
Diez
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