Manlio Perillo ha scritto:
Hi.
As with a previous post, I think I have found a possible memory problem with the uvector package.
I have this data structure (for, again, my Netflix Prize project):
IntMap (UArr (Word16 :*: Word8))
[...]
Today I have rewritten my program to use `alter` and `snocU`:
append Nothing = Just $ singletonU (a :*: b) append (Just u) = Just $ snocU u (a :*: b)
alter append k m
[...]
Unfortunately I'm still not able to load the entire Netflix Prize training data set, grouping ratings by customers, because my PC has only 2 GB of RAM. The required memory is about 2 GB, but when the system start to swap, I have to kill the program.
Just another small strictness hint: append (Just u) = u `seq` Just $ snocU u (a :*: b) and now memory usage is 955 MB. Regards Manlio