Dan Sugalski wrote:
> Dunno how many folks have machines with the newer toys in them, but I just
> ran perlbench against 5.6.0. It turns out that if you specify an
> /ARCH=HOST, and compile on an EV6 system, perl gets an overall boost of
> about 5% over a plain build. Some of the tests show a more significant
> boost (the string/base64 test got a 40% boost over a plain compile, and
> string/tr jumped 70%), generally those that deal with strings, which makes
> sense given the extra instructions in the EV5+ processors.
>
> The sad thing is that, even with the extra goodies, 5.6.0 was only 15%
> faster than 5.004_04, and that was with 5.6.0 racking up a numeric sort
> result 4x that of 5.004_04. (Plus 5.6.0 was built with the Dec C 6.2, while
> 5.004_04 was built with, I think, Dec C 5.5...)
>
> I don't think we're quite pulling ahead here, but I don't know exactly
> where 5.6.0's losing it's performance.
>
> Dan
Interesting result (did you post to p5p?). I do not quite understand
the combination of the first sentence in the second to last paragraph
(where 5.6.0 is 15% faster) and the last sentence where you seem to
imply 5.6.0 is not quite pulling ahead. Isn't a 15% speed improvement
a speed improvement?
Peter Prymmer
