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   comp.sys.apple2      Discussion about Apple II micros      56,720 messages   

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   Message 54,957 of 56,720   
   fadden to Kent Dickey   
   Re: Improving IIgs shadow copy speed wit   
   09 Sep 21 16:21:30   
   
   From: thefadden@gmail.com   
      
   On Thursday, September 9, 2021 at 10:29:33 AM UTC-7, Kent Dickey wrote:   
   > A detailed waveform of 40+ PEIs (more would be better--long enough to show a    
   > pattern repeating several times) would probably be enough to show NOPs don't    
   > help PEIs.   
      
   I was thinking more along the lines of a stripped-down game loop that ran for   
   some large number of iterations, with timings measured by pointing a cell   
   phone camera at it and counting elapsed video frames.  Less precise, but it   
   can be done without fancy    
   hardware.   
      
   Mostly I was hoping somebody had already done this experiment.  If they had   
   reached the conclusion that NOPs do help, it then becomes a question of why   
   different experiments reached different conclusions.   
      
   I wasn't able to find any evidence while researching the question initially,   
   but before I moved the "accepted answer" check I figured I'd ping the world   
   again to see if this was ever more than a rumor.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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