Re: [Haskell-cafe] binary package: memory problem decoding an IntMap

5 Apr 2009

      Manlio Perillo ha scritto:
...
Hi.
I'm having memory problems decoding a big IntMap.
The data structure is:
IntMap (UArr (Word16 :*: Word8))
There are 480189 keys, and a total of 100480507 elements
(Netflix Prize).
The size of the encoded (and compressed) data is 184 MB.
When I load data from the Netflix Prize data set, total memory usage is
1030 Mb.
It seems there is a problem with tuples, too.

I have a:
     [(Word16, UArr (Word32 :*:* Word8))]

This eats more memory than it should, since tuples are decoded lazily.

Manlio