RE: USRSPC vs. Local data

The short answer is it depends, but it may be faster in some situations, and
slower in others. I use that technique a lot (user spaces for virtual
memory) and have no issues with performance.


Bob Cozzi
Cozzi Consulting
www.rpgiv.com


-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx [mailto:rpg400-l-bounces@xxxxxxxxxxxx]
On Behalf Of Carlos Kozuszko
Sent: Saturday, August 30, 2003 6:51 AM
To: rpg400 (E-mail)
Subject: USRSPC vs. Local data


Are there any access speed differences processing data from a user space
compared with local data ?

D  Rcd1           S             82    DIM(300)
D  Rcd2           S             82    DIM(300)   BASED(pRcd2) // Pointer to
a userspace

Lets say i want to load 300 records in an array and sort it, sorting Rcd2
would be slower than Rcd1 ?

Im considering storing the data in a userspace, becouse there are chances
that the same dataset (300 records per dataset) need to be reprocessed
again, storing a userspace in qtemp by each recordset would avoid to re-read
and sort the records.
What im really wondering is if the access to the data stored in a user space
is a plain memory access just like accesing any other variable, if so, i
think my new approach is better that the current one.

Any thoughts ?

Carlos Kozuszko

_______________________________________________
This is the RPG programming on the AS400 / iSeries (RPG400-L) mailing list
To post a message email: RPG400-L@xxxxxxxxxxxx
To subscribe, unsubscribe, or change list options,
visit: http://lists.midrange.com/mailman/listinfo/rpg400-l
or email: RPG400-L-request@xxxxxxxxxxxx
Before posting, please take a moment to review the archives
at http://archive.midrange.com/rpg400-l.