Not the answer to the question you asked but ... "Performance" has at least two definitions: least elapsed wall clock time and least CPU utilization.
Another option would be BPXWDYN ... EXECIO DISKW. Charles On Wed, 19 Apr 2023 13:44:39 -0400, David Spiegel <[email protected]> wrote: >Hi, >I am writing a Rexx Exec (Batch TSO) to build 10,000+ members in a PDS >(FB/159/27984). >The average member size is 900 lines. > >In terms of performance, which method should I use?: >1) ALLOC ... EXECIO DISKW >2) LMOPEN ... LMINIT ... LMPUT >3) Something else >4) Makes no difference ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
