[Haskell-cafe] why PArr slower than list ?

[Brandon S. Allbery KF8NH]

On Nov 14, 2007, at 21:50 , Albert Lee wrote:

> dotp :: Num a => [:a:] -> [:a:] -> a

You're forcing Num a => a here, whereas the list one probably  
specializes to Integer.  Seems like a bad way to go to me;  
polymorphism is expensive.  (Whether it's *that* expensive, I  
couldn't tell you.)

-- 
brandon s. allbery [solaris,freebsd,perl,pugs,haskell] allbery at kf8nh.com
system administrator [openafs,heimdal,too many hats] allbery at ece.cmu.edu
electrical and computer engineering, carnegie mellon university    KF8NH