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  2. RPG400-L
  3. August 2007

Re: Is a SETLL faster than a CHAIN


If you do a setll to check for the existence of a key, end then if existe make the chain.
The second option, chain directly may be faster because if the key does not existe, you do nothin if it exist you have done the chain.

It is not he truth, just a feeling.
-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx
[mailto:rpg400-l-bounces@xxxxxxxxxxxx] On Behalf Of Mike Cunningham
Sent: Wednesday, August 08, 2007 8:00 AM
To: RPG programming on the AS400 / iSeries
Subject: Is a SETLL faster than a CHAIN

I need to get data from a file but I know that for every 100 records I
process only 1 will have a record in the file I am going to CHAIN to. Is
it faster to first to a SETLL to see if the key exists and if it does do
a CHAIN or is just doing the CHAIN just as fast? Many years ago in the
S/38 days I know the recommendation was to the SETLL then the CHAIN.
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