NOP on HP-41C

[hth]

(12-28-2020 05:57 PM)Dave Britten Wrote:  Very true. I'm guessing many large application programs end up VIEWing something, thus hiding the goose. Has anybody benchmarked the effect of having the goose visible vs. having VIEW/AVIEW visible when passing a label? I could whip up a little program on my 41CX that times execution for, say, 1000 loop iterations, and run it both with and without an initial AVIEW.

Each move of the goose costs 15 cycles extra compared to if a message is shown. The code is:

Code:


SLBL:         ?s5=1                 ; display got something?
                                    ; (MSGFLG?)
              rtn c                 ; yes
              gosub   ENLCD
              rabcr                 ; rotate goose
              golong  ENCP00