FWIW I tried adding DISP=(,PASS) to all of the DDs and adding another (BR14 also) step. No difference in the step CPU time -- still 0.00 seconds.
Of course, one could play guessing games all day. Is the Initiator smart enough to know the whole job is one big no-op? I would guess not, but who knows. Charles -----Original Message----- From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of Paul Gilmartin Sent: Tuesday, August 6, 2019 12:45 PM To: [email protected] Subject: Re: CPU time cost of dynamic allocation On Tue, 6 Aug 2019 12:25:05 -0400, Charles Mills wrote: > >OTOH I have an IEFBR14 batch job on the same machine that allocates 15 >temporary datasets in JCL. The entire job lock, stock and barrel uses >(according to IEF032I) .00 CPU seconds. Can anyone explain why JCL >allocation is apparently much more CPU efficient than SVC 99 allocation? > Nowadays, z/OS performs some special optimization for IEFBR14 (it knows it's not going to use those data sets anyway.) Might that come into play here? ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
