Changes between Version 47 and Version 48 of WikiStart
- Timestamp:
- Jun 19, 2012, 4:17:33 AM (12 years ago)
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WikiStart
v47 v48 34 34 35 35 Q: 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...36 A: 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... 37 37 38 38 Q: Why does the runtime vary so much from run to run? [[br]]
