I agree.  In addition,

It is worth using indexes instead of subscripts even for just a few 
references.  If you have a loop over an subscript consider changing to a 
loop over an index.  Define the termination value as an index data item. 
Before the loop, set the index to the loop termiantion value.  Then set 
the index data item to the index.

Also using random or skip sequential VSAM access to process a VSAM file 
using more than about 1% of the records should be replaced with sequential 
comparison. especially with QSAM files.  Using a path on an alternate 
index for sequential processing can also be a killer.

IBM Mainframe Discussion List <IBM-MAIN@BAMA.UA.EDU> wrote on 10/12/2006 
12:21:47 PM:

> I have seen this CPU usage before for a couple of reasons:

>  1).  Heavy internal tabling or table lookups.
>  2).  Use of the "INITIALIZE" verb is a killer in a complex table
>       that gets executed many times.



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