[Haskell-cafe] definition of sum

[TeXitoi]

After programming as an exercice the sum function, my version is
faster than the Data.List's version. Looking at the source code,
Data.List uses a foldl and not a foldl'. foldl' seems faster and
allows to use very big lists. So, why is foldl used by Data.List for
sum?

-- 
Guillaume Pinot               http://www.irccyn.ec-nantes.fr/~pinot/

« Les grandes personnes ne comprennent jamais rien toutes seules, et
c'est fatigant, pour les enfants, de toujours leur donner des
explications... » -- Antoine de Saint-Exupéry, Le Petit Prince

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