Are there no internal IBM methods of asking? There's the COBOL Cafe at the Compile Cafe: https://www.ibm.com/developerworks/community/forums/html/forum?id=11111111-0000-0000-0000-000000002281&p, a couple of compiler developers visit. There's also some advice posted there, and elsewhere.
If the site has *very large* programs, V6.1 could/would be a better choice, as the compiler uses 64-bit addressing allowing it to consume larger programs more efficiently (or at all for OPT(2)). Without knowing which compiler options have been chosen, it is difficult to say about the size. Unless it is the debugging, 3-4 times the size for OPT(2) sounds excessive, as does 50% for OPT(0). OPT(0) does do some optimisation. In-lining of some PERFORMs does increase size. Prior to V5 there is a "cap" to the size increase. I don't know that that has changed. Consult the fix list, http://www-01.ibm.com/support/docview.wss?uid=swg27041164, and review what is and isn't applied already. CPU times should generally improve, and should be noticeable. Hopefully the compile options chosen are largely those already in use. Note that there are some new "diagnosis"-type options which can help to identify things which could cause different behaviours. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
