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   CBM      Commodore Computer Conference      4,328 messages   

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   Message 2,409 of 4,328   
   Shaun Bebbington to Janne Johansson   
   Re: C64 BASIC - what's faster INT() or %   
   19 Apr 18 01:14:37   
   
   On Thursday, 19 April 2018 08:14:28 UTC+1, Janne Johansson  wrote:   
   > On 2018-04-18 09:37, Shaun Bebbington : Janne Johansson wrote:   
   > > On Wednesday, 18 April 2018 16:41:28 UTC+1, Janne Johansson  wrote:   
   > >> On 2018-04-18 05:38, Shaun Bebbington : All wrote:   
   > >> > Thanks for the hints all. I'll do some bench mark testing or   
   > >> whatever :-)   
   > >>   
   > >> Please do. If benchmarking with a FOR loop over hundreds or thousands of   
   > >> repetitions is too hard to figure it out, then the answer isn't really   
   > >> important.   
   > >   
   > > Hey! Good hint.   
   >    
   > I noticed (after sending of course) that it may have been perceivable as   
   > a harsh statement, hinting at lazyness or something, I meant more along   
   > the lines of "if you try 100 loops and can't make out the difference,   
   > then try 1000 loops then try 10k loops and so on, the difference might   
   > be so small that its not worth coding your BASIC programs with %   
   > sprinkled here and there for optimization reasons, but just go for   
   > normal ordinary readability and simplicity since performance is then   
   > bound by something else like algorithmic complexity and not the one-time   
   > conversions from ints to floats and back".   
   >    
   > If you really need a basic program to run faster, there are a lot of   
   > compilers that pre-calculate and pre-parse and then make some kind of   
   > machine language equivalent program out of it which you can run and   
   > which will be lots faster. If that isn't fast enough still, code   
   > important parts in ASM directly or at least code it up in CC65 using   
   > C for some middle ground between compiled BASIC and doing it all in   
   > ASM yourself.   
      
   Yes Blitz BASIC seems to do a reasonably good job at this. As for C, well I   
   love C. My thinking is like this: optimize BASIC, then compile. That should get   
    the best results.   
      
   Regards,   
      
   Shaun.   
      
   --- SoupGate-Win32 v1.05   
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