Midrange News for the IBM i Community

Posted by: Bob Cozzi
Rogue Programmer
Cozzi Productions, Inc.
Performance of the Rreadn (rec I/O) API
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Published: 01 May 2013
Revised: 02 May 2013 - 2121 days ago
Last viewed on: 21 Feb 2019 (3541 views) 

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Performance of the Rreadn (rec I/O) API Published by: Bob Cozzi on 01 May 2013 view comments(2)

I had to move from standard RPG IV I/O (CHAIN, READ, SETLL...) to using the _ROpen, _RReadn and _RLocate functions in my Copy to CSV routine.

What I'm noticing now is that the time it takes to convert a LARGE database file to CSV has increased substantially over native RPG I/O methods.

Does anyone have any performance tips, documents or webpage(s) that might help improving performance when processing tens of thousands of records with the _Rxxxx I/O APIs.

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