Re: st: RE: -collapse- versus homebrew

[Chris Ruebeck <ruebeckc@lafayette.edu>]

I'll accept the guess.  But note that my example was only twice as 
fast, so there would still seem to be some point where the more 
efficient coding of -collapse- wins.

Chris

On Feb 21, 2005, at 9:33 AM, Nick Cox wrote:

> I'll make a guess. -collapse- can never be faster than customised code 
> that focuses
> on exactly what you want to do, as typically you are replacing a few 
> hundred lines of
> Stata with a few.
>
> Chris Ruebeck wrote
>
> > When we generate bootstrapped standard errors and perform Monte Carlo 
> > analyses, it's useful to make the code as speedy as possible.  So I 
> > thought about -collapse- for a moment and performed the following 
> > speed test listed below.  The timing results follow it, showing that 
> > my homebrewed version was twice as fast as -collapse-.
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