| Re: IDL 6.3 for Mac OS X on Intel Now Available [message #49316 is a reply to message #49315] |
Thu, 13 July 2006 12:00   |
Foldy Lajos
Messages: 268
Registered: October 2001
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Senior Member |
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Hi,
a little FL promotion :-)
On Thu, 13 Jul 2006, JD Smith wrote:
> it's *FAST*. Here's the breakdown for some portable OSX systems,
> following along the tests at:
>
> http://idl.tamu.edu/mac_bench.php
>
> System TT3 (AVG) TT3 (GEOM) JD_TEST
> ============================================================ =================
> PB (G4 1.67GHz, 2GB, PPC IDL native) 3.20 .13 1.86
> MBP(CoreDuo 2GHz, 1GB, PPC IDL via Rosetta) 3.45 .13 3.02
> MBP(CoreDuo 2GHz, 1GB, i386 IDL native) 1.69 .06 0.32
FL (64 bit linux) on a dual 1.8GHz Opteron 0.57 .02 0.13
not bad :-)
for FL, TT3 includes assoc test (0.02 s), and running JD_TEST as
a=randomu(sd,100L*100000l)
t=systime(1) & a=sqrt(a)/(a>0.5) & print,systime(1)-t
(!CPU.TPOOL_MIN_ELTS is 0 by default in FL, because FL uses different
limits for different operations (eg 100000 for addition, 25000 for sin))
and another good news: the new Intel Core 2 processors will have more
SSE/SSE2 execution units, so FL will be even faster.
regards,
lajos
> All times in seconds.
>
> PB == PowerBook
> MBP == MacBook Pro (thanks to Jason Harris for a temporary loan)
> TT3 == Time Test 3, run under IDL 6.3, demo mode.
> AVG == average
> GEOM == geometric mean
> JD_TEST ==
> IDL> a=randomu(sd,100L*!CPU.TPOOL_MIN_ELTS)
> IDL> t=systime(1) & a=sqrt(a)/(a>0.5) & print,systime(1)-t
>
> So, for things which are limited by a single processor (TIME_TEST3),
> we're roughly ~2x faster than a G4 PB (which was a slow IDL system, to
> be fair), with only 20% more clock speed.
>
> But, the real fun comes when running big array manipulations, like
> JD_TEST, where the dual Core Duo processors can flex their muscles.
> Here the speedup is closer to 6x, which is almost too good to believe.
> This will of course depend on which operations you use, but testing a
> variety of arithmetic ones, I found speedups of anywhere from 2-7 on
> arrays large enough to make multi-threading effective.
>
> The MBP (a portable system) is now comparable in speed to a quad-processor
> G5, and (I suspect) similar dual-processor Linux/Windows desktops. Very
> respectable. Woeful OSX/IDL performance, R.I.P.
>
> JD
>
>
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