It may be fast, but it runs a long time. Talking about 'speed'! Kees.
> -----Original Message----- > From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On > Behalf Of Rick J. Valles > Sent: 13 August, 2019 18:13 > To: IBM-MAIN@LISTSERV.UA.EDU > Subject: Re: Instruction speeds > > Here’s my IEFBR15 “Utility” - it’s pretty fast: > > Active Usings: None > Loc Object Code Addr1 Addr2 Stmt Source Statement > 000000 00000 00002 1 IEFBR15 CSECT > 000000 07FF 2 BR 15 > 3 END > > :) > > > r > > > On Aug 13, 2019, at 10:09 AM, Brian Chapman <bchapma...@gmail.com> > wrote: > > > > Thanks Charles and Steve. > > > > Now that I am becoming a more experience assembler programmer, I have > > wondered if I should be greatly concerned about instruction timings or > > pipeline order, or just simply focus on readability and maintenance. > > Especially since assembler programming is becoming a dying art. I think > I > > am only 1 of a handful of assembler programmers at my shop with hundreds > of > > mainframe programmers! I think you both answered my question. Thanks! > > > > > > > > Thank you, > > > > Brian Chapman > > > > > > On Tue, Aug 13, 2019 at 11:39 AM Steve Smith <sasd...@gmail.com> wrote: > > > >> Write good code and forget about instruction timings. With any luck > your > >> code will have to perform on several generations of architecture and > >> machines. > >> > >> There's a big difference between B- (base-index-displacement) branches > and > >> J- (or BR-) (relative address) instructions. Surely by now, this > should go > >> without saying. Regardless of whether they're "faster" or not, they > are > >> much better, and as that is well-documented, I won't belabor it. > >> > >> sas > >> > >> ---------------------------------------------------------------------- > >> For IBM-MAIN subscribe / signoff / archive access instructions, > >> send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN > >> > > > > ---------------------------------------------------------------------- > > For IBM-MAIN subscribe / signoff / archive access instructions, > > send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN > > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN ******************************************************** For information, services and offers, please visit our web site: http://www.klm.com. This e-mail and any attachment may contain confidential and privileged material intended for the addressee only. If you are not the addressee, you are notified that no part of the e-mail or any attachment may be disclosed, copied or distributed, and that any other action related to this e-mail or attachment is strictly prohibited, and may be unlawful. If you have received this e-mail by error, please notify the sender immediately by return e-mail, and delete this message. Koninklijke Luchtvaart Maatschappij NV (KLM), its subsidiaries and/or its employees shall not be liable for the incorrect or incomplete transmission of this e-mail or any attachments, nor responsible for any delay in receipt. Koninklijke Luchtvaart Maatschappij N.V. (also known as KLM Royal Dutch Airlines) is registered in Amstelveen, The Netherlands, with registered number 33014286 ******************************************************** ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
