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st: Recode slow


From   Brendan Halpin <brendan.halpin@ul.ie>
To   statalist@hsphsun2.harvard.edu
Subject   st: Recode slow
Date   25 Oct 2005 10:07:07 +0100

Is it normal that recode should be very slow with large numbers of
"rules"? I find a recode statement with >400 value assignments adds
something of the order of a minute to a job.

N is moderately large (75k) but I wonder if recode is linear in N
but non-linear in the number of rules or assignments.

If so, any tips for efficiency? Break up the command into several
smaller recodes? Ship out the equivalences to a lookup table and
merge?

Brendan
-- 
Brendan Halpin,  Department of Sociology,  University of Limerick,  Ireland
Tel: w +353-61-213147 f +353-61-202569 h +353-61-338562; Room F2-025 x 3147
mailto:brendan.halpin@ul.ie  http://www.ul.ie/sociology/brendan.halpin.html
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