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st: is merge old version faster?


From   Enzo Coviello <enzo.coviello@tin.it>
To   statalist@hsphsun2.harvard.edu
Subject   st: is merge old version faster?
Date   Wed, 03 Oct 2012 17:38:28 +0200

Dear Stata Users,

I am checking a new command computing the net survival according to Pohar Perme method, -stnet-.
Internally the command must repeatedly merge two files.

When -merge- is specified according to the version 10 syntax it seems that -stnet- is faster than in the case -merge- is used according to the version 11 or 12.

Has anyone else noticed that -merge- old version is faster than -merge- new version?
If yes, what could be the reason?

Do you know a way to make faster the merging of files?

Enzo




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Enzo Coviello
Epidemiology Unit - Cancer Registry ASL BT
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