Joe, As previously mentioned. Set up an ISPF JCL skeleton and build your JCL using File Tailoring.
Sometimes you have to slow down and break down the problem too. DFSORT or Syncsort are very fast but first off, test against one dataset and get some indicative timings. end to end that will give you a baseline, then just add up all the elapsed times and CPU. You perhaps have an IEFUSI exit that is limiting your job or cpu time. TIME=1440 is often disabled, so talk to a systems programmer. You should have a job class for long running/high CPU jobs. On Thu, Oct 8, 2020 at 11:52 AM Jeremy Nicoll <[email protected]> wrote: > On Thu, 8 Oct 2020, at 01:10, Seymour J Metz wrote: > > No, I'm saying that I know what the CHANGE command does. Did the OP say > > that the relevant lines are contiguous? > > No, he said nothing at all except that > > "On a different note. I just compared EDIT macro performance > versus IPOUPDTE. IPOUPDTE was about 600 times faster." > > Of course I'm not surprised that a specific utility is faster, but how much > faster depends on lots of things that weren't stated - which I thought > made the comparison more or less worthless. > > It reminds me of the discovery I made back in the 1980s, on a VM/CMS > system, that one could copy a file more quickly using Xedit to load the > file then write it elsewhere (with a macro governing that), than by using > the CMS file copy command. > > As far as I remember, IBM admitted that Xedit I/O had been optimised > to make it as fast as possible, to help sell VM, CMS and Xedit as a > development tool. > > -- > Jeremy Nicoll - my opinions are my own. > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN > -- Wayne V. Bickerdike ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
