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Re: st: Overriding a loop if 0 observations using tabstat
From
Richard Goldstein <[email protected]>
To
[email protected]
Subject
Re: st: Overriding a loop if 0 observations using tabstat
Date
Wed, 28 Apr 2010 08:34:59 -0400
Like Kit, I also found a dramatic advantage for -count- on my machine; I
have a 64-bit MacPro running Stata11/MP8
when I set memory to any of 2m, 5m or 10m, I found approximately the
following times: 6.1, 49.5, 55.6
however, when I set memory to any of 50m, 500m, 5g or 25g (I have 32G of
RAM), I find the following: 6.2, 99, 104
so, little change for count, much change for summarize
I think a comment from StataCorp on why there are big changes for
summarize when changing memory would be appropriate here
Rich Goldstein
On 4/28/10 8:26 AM, Kit Baum wrote:
> <>
> I find a dramatic advantage for -count- on my 4-core 64-bit MacPro, running Stata 11/MP4:
>
> 13.53; 60.70; 72.25
>
> The activity monitor showed all four cores maxed out during -summarize-, so whether it is affected as much by paralleiization, it seems to be able to utilize everything the machine has to offer.
>
> Unlike Robert, I find that reducing memory allocation from 500m to 100m slows it down!
>
> Kit Baum | Boston College Economics & DIW Berlin | http://ideas.repec.org/e/pba1.html
> An Introduction to Stata Programming | http://www.stata-press.com/books/isp.html
> An Introduction to Modern Econometrics Using Stata | http://www.stata-press.com/books/imeus.html
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