Hi All. I've two question about Data Parallel Haskell. I'm trying some experiment using DPH and I've wrote a little program using the functions lengthP and mapP. I've imported the module GHC.PArr and I've informed the compiler that I want to use some language extension using the line {-# LANGUAGE PArr #-}. All works fine. Looking around I've saw that some code examples use {-# LANGUAGE PArr, ParallelListComp #-} instead. The my first question is: Which is the difference in using or not the extension ParallelListComp? Seems that my program works fine with or without this extension (if I omit the extension PArr I've some compilation errors). The second question is: Have I to use the option -threaded when compile my program? I'm using Haskell Platform (GHC 6.12.1) on MacOS X 10.6.3 Thanks in advance for any answer. Luca. _________________________________________________________________ http://clk.atdmt.com/UKM/go/197222280/direct/01/ Do you have a story that started on Hotmail? Tell us now