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Re: st: 100x slower Graphics


From   Edwin Leuven <leuven@fee.uva.nl>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: 100x slower Graphics
Date   Fri, 11 Apr 2003 19:04:16 +0000

doing the histogram

. reg secs n if n>100000

      Source |       SS       df       MS              Number of obs =      25
-------------+------------------------------           F(  1,    23) =22303.98
       Model |  58.5205268     1  58.5205268           Prob > F      =  0.0000
    Residual |  .060346731    23  .002623771           R-squared     =  0.9990
-------------+------------------------------           Adj R-squared =  0.9989
       Total |  58.5808735    24  2.44086973           Root MSE      =  .05122

------------------------------------------------------------------------------
        secs |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
           n |   .0002122   1.42e-06   149.35   0.000     .0002092    .0002151
       _cons |   2.543675   .1608615    15.81   0.000     2.210907    2.876442
------------------------------------------------------------------------------

. di 10/_b[n]
47132.184

so 2.5 secs fixed cost, and every 50000 obs add approx 10 secs

stata 8 of course, in stata 7 things are almost instanteneous

ed.

On Fri Apr 11, 2003 17:38, David Airey wrote:
> instead of auto.dta
>
> In talking to Stata about a month ago on graphing speed, I think I was
> told there should not be that much difference in speed of display based
> on the number of observations. Do you see a big difference?
>
> -Dave
>
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