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As far as I am aware, there should be 0% performance difference. As far as your RPG program knows, it's a physical file. I don't think it can tell the difference between a PF-SRC and a PF-DTA, that is just an attribute byte that is used by programs to know how to open the file. That is, PDM will not allow option 2 (change) on a member of a PF-SRC, but will allow you to a PF-DTA. Also, PF-SRC doesn't allow you specify the DDS for the file on creation. Regards, Jim Langston Bruce Jin wrote: > I wonder how much difference there is (in terms of performance) when I use > a physical file versus a source physical file. Assume I do OVRDBF, OPEN, > READ, CLOSE in RPG. The record lengths for both PF and SRCPF are the same. > The PF has only 1 or 2 fields in it. Both PF and SRCPF have 500 records. > > Thanks +--- | This is the RPG/400 Mailing List! | To submit a new message, send your mail to RPG400-L@midrange.com. | To subscribe to this list send email to RPG400-L-SUB@midrange.com. | To unsubscribe from this list send email to RPG400-L-UNSUB@midrange.com. | Questions should be directed to the list owner/operator: david@midrange.com +---
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