Changes between Version 34 and Version 35 of WikiStart


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Timestamp:
Jun 14, 2011, 12:27:45 PM (12 years ago)
Author:
Ben Lippmeier
Comment:

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  • WikiStart

    v34 v35  
    3232
    3333Q: Why is my program so slow? [[br]]
    34 A: Probably because you haven't forced your source arrays before traversing them, or haven't added enough INLINE pragmas. Read [http://www.haskell.org/haskellwiki/Numeric_Haskell:_A_Repa_Tutorial#Optimising_Repa_programs the optimisation section] in the tutorial, then [http://stackoverflow.com/questions/6300428/poor-performance-with-transpose-and-cumulative-sum-in-repa/6340867#6340867 This Answer] on Stack Overflow. If it's still a problem then continue on...
     34A: Probably because you haven't forced your source arrays before traversing them, or haven't added enough INLINE pragmas. In particular you should force image arrays read with the BMP routines before traversing them. Read [http://www.haskell.org/haskellwiki/Numeric_Haskell:_A_Repa_Tutorial#Optimising_Repa_programs the optimisation section] in the tutorial, then [http://stackoverflow.com/questions/6300428/poor-performance-with-transpose-and-cumulative-sum-in-repa/6340867#6340867 This Answer] on Stack Overflow. If it's still a problem then continue on...
    3535
    3636Q: Where do I ask further questions? [[br]]