I still don't think this speculation is productive. The compilers exist. Rather than guessing about a hypothetical performance issue, just run a reasonably careful, straightforward benchmark and report actual results. This is a fully, easily testable hypothesis. To my knowledge IBM has no evidence in support of this hypothesis -- indeed, evidence to the contrary -- but also to my knowledge IBM is *delighted* to receive such feedback from customers.
>The COBOL Version 5.2 Programmers Guide states on page >660 that NUMPROC(NOPFD) is less efficient than NUMPROC(PFD). I assume that statement is correct. Please note carefully it's a statement entirely within the scope of Enterprise COBOL Version 5.2, and it does not quantify that difference. (It's quite possible the efficiency gap is smaller in the new compiler than in the old compiler.) That statement also does not in any way support a hypothesis that NUMPROC(NOPFD) in Enterprise COBOL Version 5.2 is less efficient than NUMPROG(MIG) in Enterprise COBOL Version 4.2. But even assuming a hypothetical NUMPROC(MIG) were technically possible to implement in the new compiler (it may not be!), the Guide's statement also does not mean that a hypothetical NUMPROC(MIG) would necessarily yield any performance benefit in the new compiler. It's a new compiler, with new technologies and new optimizations for systems with far more advanced hardware capabilities. It's a different world. I really, really don't think it's a radical notion to spot check actual performance results before even getting mildly concerned about one compiler parameter's retirement. Evidence matters. (So does absence of evidence, especially over time.) -------------------------------------------------------------------------------------------------------- Timothy Sipples IT Architect Executive, Industry Solutions, IBM z Systems, AP/GCG/MEA E-Mail: [email protected] ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
