John, I concur.... However ... there is one question I'd like to ask if I may.
Have the 'longer' times for MVCL's been noticed on 'older' processors ?. Has MVPG (limited users) been tried ? .. and again ... for MVPG that is, any difference between 'older' and the 'new' z10 ?. Jim Thomas 617-233-4130 (mobile) 636-294-1014 (res) [email protected] (Email) -----Original Message----- From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of john gilmore Sent: Wednesday, June 01, 2011 10:02 AM To: [email protected] Subject: Re: What is the current feeling for MVC loop vs. MVCL? The "optimizations" that compilers use are certainly interesting in the sense that there are things to be learned from them. They do, however, have two limitations. They are particularist, appropriate usually but not always to the run-time environment in which a particular compiler's output will be executed but often less so in a different environment. (Both advantages and disadvantages have, for example, attended the use of shared optimizing machinery by IBM PL/I and C.) These optimizations are also devised by groups whose full-time job is to optimize code skeletons that are used stereotypically in compiler-generated code; and these groups inevitably come to have a vested interest in cleverness, i.e., non-standard, less than obvious ways of doing things. I have been dismayed by this thread. It would be better for almost all of us almost all of the time to use MVCLs, devoting the time not wasted by examining clever alternatives to them to more significant problems. John Gilmore Ashland, MA 01721-1817 USA ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html ----- No virus found in this message. Checked by AVG - www.avg.com Version: 10.0.1375 / Virus Database: 1509/3671 - Release Date: 05/31/11 ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
