[Haskell-cafe] possible memory leak in uvector 0.1.0.3
daniel.is.fischer at web.de
Tue Mar 3 09:47:36 EST 2009
Am Dienstag, 3. März 2009 15:35 schrieb Manlio Perillo:
> Claus Reinke ha scritto:
> >>> At first guess it sounds like you're holding onto too much, if not the
> >>> whole stream perhaps bits within each chunk.
> >> It is possible.
> >> I split the string in lines, then map some functions on each line to
> >> parse the data, and finally calling toU, for converting to an UArr.
> > Just to make sure (code fragments or, better, reduced examples
> > would make it easier to see what the discussion is about): are you
> > forcing the UArr to be constructed before putting it into the Map?
> parse handle =
> contents <- S.hGetContents handle
> let v = map singleton' $ ratings contents
> let m = foldl1' (unionWith appendU) v
> v `seq` return $! m
The (v `seq` ) is completely useless.
(size m) `seq` return m
> -- Build a Map with a single movie rating
> singleton' :: (Word32, Word8) -> MovieRatings
> singleton' (id, rate) =
> singleton (fromIntegral $ id) (singletonU $ pairS (id, rate))
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