[Haskell-cafe] two problems with Data.Binary and Data.ByteString
dons at galois.com
Tue Aug 12 20:47:14 EDT 2008
> On Tue, Aug 12, 2008 at 5:13 PM, Tim Newsham <newsham at lava.net> wrote:
> > The data type I'm storing is a Map (of maps):
> > type DailyDb = M.Map Date Daily
> > type InstrsDb = M.Map String DailyDb
> > What's going on here?
> The default marshalling scheme that Binary uses for lists and maps
> (which are flattened to lists before writing out) is not streamable.
> Instead of writing out data in chunks, it computes the length of the
> list and writes that, followed by the elements. Presumably on the read
> side, a huge thunk is being built up before any actual Map creation
Maybe it makes sense to have the streamble list instance in Binary as
well, with some examples?
More information about the Haskell-Cafe