[Haskell-cafe] Slow Text.JSON parser

[Sjoerd Visscher]

It is not impossible, but a lot of work. And if you want to do it  
correctly you would have to support UTF-16 (BE of LE) and UTF-32 (BE  
of LE) as well. You can't expect someone to start writing utf encoders  
and decoders every time he needs a fast parser.

Sjoerd

On Jan 14, 2009, at 12:42 AM, Luke Palmer wrote:

> On Tue, Jan 13, 2009 at 4:39 PM, Sjoerd Visscher  
> <sjoerd at w3future.com> wrote:
> JSON is a UNICODE format, like any modern format is today.  
> ByteStrings are not going to work.
>
> I don't understand this statement.  Why can one not make a parser  
> from ByteStrings that can decode UTF-8?
>
> Luke
>
>
>
> If everybody starts yelling "ByteString" every time String  
> performance is an issue, I don't see how Haskell is ever going to be  
> a "real world programming language".
>
>
> On Jan 13, 2009, at 4:00 PM, Don Stewart wrote:
>
> ketil:
> "Levi Greenspan" <greenspan.levi at googlemail.com> writes:
>
> Now I wonder why Text.JSON is so slow in comparison and what can be
> done about it. Any ideas? Or is the test case invalid?
>
> I haven't used JSON, but at first glance, I'd blame String IO.  Can't
> you decode from ByteString?
>
>
> Text.JSON was never optimised for performance. It was designed for  
> small
> JSON objects. For things above 1M I'd suggest using Data.Binary (or a
> quick JSON encoding over bytestrings). Shouldn't be too hard to  
> prepare.
>
> -- Don
> _______________________________________________
> Haskell-Cafe mailing list
> Haskell-Cafe at haskell.org
> http://www.haskell.org/mailman/listinfo/haskell-cafe
>
> --
> Sjoerd Visscher
> sjoerd at w3future.com
>
>
>
>
> _______________________________________________
> Haskell-Cafe mailing list
> Haskell-Cafe at haskell.org
> http://www.haskell.org/mailman/listinfo/haskell-cafe
>

--
Sjoerd Visscher
sjoerd at w3future.com



-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://www.haskell.org/pipermail/haskell-cafe/attachments/20090114/0a9d320b/attachment.htm