A GREAT introduction to this topic, by someone who unlike me actually knows what he is talking about:
https://linuxmain.blogspot.com/2017/02/zoptimizationprimer.html Charles -----Original Message----- From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of Brian Chapman Sent: Monday, August 12, 2019 5:48 PM To: [email protected] Subject: Instruction speeds Hi everyone, I did some searching, but I didn't find anything that really discussed this on the topic that I'm interested. Is there anything published that compares the cycle times of the most used instructions? For example; moving an address between areas of storage. I would assume that executing a LOAD and STORE would be much quicker than executing a MVC. Or executing a LOAD ADDRESS to increment a register instead of ADD HALF WORD. Or does this really matter as much as ordering the instructions so they are optimized for the pipeline? ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
