Changes between Version 47 and Version 48 of WikiStart


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Timestamp:
Jun 19, 2012, 4:17:33 AM (8 years ago)
Author:
Ben Lippmeier
Comment:

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  • WikiStart

    v47 v48  
    3434
    3535Q: Why is my program so slow? [[br]]
    36 A: Probably because you haven't forced your source arrays before traversing them, or haven't added enough INLINE pragmas. In particular you may need to 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...
     36A: Probably because you haven't applied {{{computeP}}}, 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...
    3737
    3838Q: Why does the runtime vary so much from run to run? [[br]]