In my research for a client we saw dramatically increased compile times, both CPU and elapsed, for COBOL 6.2 as opposed to 4.2. It was particularly dramatic for larger programs, and with OPT(1) and OPT(2).
Charles -----Original Message----- From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of Pommier, Rex Sent: Monday, April 18, 2022 1:18 PM To: [email protected] Subject: I knew Cobol 6.3 takes more resources to compile than 4.2 but should I be concerned about how much? Hi list, Should I be concerned about the amount of resources Cobol 6.3 is occasionally using as compared to 4.2? I have one particular example that was brought to our attention due to the fact that we ran out of page space in our small shop. I finally got it to compile after tripling my page space. It is a CICS program and is only 11270 lines long. I am compiling with Expediter, but have optimization(0) configured so there is no additional compile-time processing being done to optimize the load module. I removed Expediter and still had the issues. Here are my comparisons. Has anybody else seen this kind of huge increase? Cobol42 without Expediter TCB .00499 minutes wall clock 2 seconds paging 0 serv 14956 Cobol42 with Expediter TCB .0138 minutes wall clock 2 seconds paging 0 serv 39158 Cobol63 without Expediter TCB 8.665 minutes wall clock 31 minutes paging 3185K serv 23,371,699 Cobol63 with Expediter TCB 8.519 minutes wall clock 23 minutes paging 4522K serv 22,980,890 I will be opening a ticket with IBM but was wondering if anybody else has seen this kind of spike. I have only seen this on one program and I have had my developers compile hundreds of programs. I've seen CPU and wall clock time increases but nothing like this. Obviously wall clock time is so variable due to other tasks running, I just included it to show the drastic increase. 2 seconds to 23-31 minutes is insane. Thanks, Rex ---------------------------------------------------------------------- The information contained in this message is confidential, protected from disclosure and may be legally privileged. If the reader of this message is not the intended recipient or an employee or agent responsible for delivering this message to the intended recipient, you are hereby notified that any disclosure, distribution, copying, or any action taken or action omitted in reliance on it, is strictly prohibited and may be unlawful. If you have received this communication in error, please notify us immediately by replying to this message and destroy the material in its entirety, whether in electronic or hard copy format. Thank you. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
