[Haskell-cafe] Is it possible to have constant-space JSON decoding?

[Clark Gaebel]

Aeson is used for the very common usecase of short messages that need to be
parsed as quickly as possible into a static structure. A lot of things are
sacrificed to make this work, such as incremental parsing and good error
messages. It works great for web APIs like twitter's.

I didn't even know people used JSON to store millions of integers. It
sounds like fun.

  - Clark


On Tue, Dec 4, 2012 at 9:38 AM, Iustin Pop <iustin at google.com> wrote:

> On Tue, Dec 04, 2012 at 12:23:19PM -0200, Felipe Almeida Lessa wrote:
> > Aeson doesn't have an incremental parser so it'll be
> > difficult/impossible to do what you want.  I guess you want an
> > event-based JSON parser, such as yajl [1].  I've never used this
> > library, though.
>
> Ah, I see. Thanks, I wasn't aware of that library.
>
> So it seems that using either 'aeson' or 'json', we should be prepared
> to pay the full cost of input message (string/bytestring) plus the cost
> of the converted data structures.
>
> thanks!
> iustin
>
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