Les Koehler wrote: >The gory details escape me now, but we had a customer application at IGS that >issued a *lot* of CP commands. Customers complained of poor response time so >we consulted with Development and were advised that in that particular >situation we should abbreviate CP commands for improved performance.
>We were doubtful but coded an old vs. new test and timed their performance >(both Virtual and Elapsed) on our lightly loaded Customer Production cpu at >2am on a Sunday when we had a maintenance window and customers couldn't log on. >The results confirmed what Development had said, so we retested on our highly >loaded Dev system during prime time and the resulting difference was obvious. >That was sometime long before my retirement in May 2004 and was a *very* >unusual case. Generally, I would always use the fully spelled out CP command. Les, I know you well enough to trust your sincerity, but empiricism beats out memory any day. I just ran a test and the full command was consistently faster, trying various CP commands. So...color me skeptical. I'm trying to remember if there are CP commands besides IPL whose behavior varies depending on whether they're abbreviated or not; I can't think of any. Anyone? ...phsiii
