Interestingly, Peter Relson wrote: <begin extract> By the way, despite 50 years of history (or over 30 since BASR became available), I'm told that BASR is marginally better to use than BALR. <end extract>
and this is what I find when, after each new z/OS release, I make my own necessarily crude timing studies. (Instruction timings and, not a little surprisingly to me, not just the millicode-implemented ones, are moving targets on the same platform.) I have long wished for something better and, in particular, for something better from IBM. I think I understand (and I can readily sympathize with) its apparent reluctance to provide absolute timings, but a set of index numbers that compared instruction-execution times in some standard testbed for each release of z/OS (or at some other, perhaps better canonical interval) would be helpful to those of us write assembly-language routines. Currently, there are urban legends, many of them fantastical or long obsolete, but almost no hard facts available in this area. John Gilmore, Ashland, MA 01721 - USA ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
