The latest version of aeson is 2.2.3.0-2.

aeson

Version 0.3.2.1 revision 1 uploaded by phadej.

Package meta

Synopsis
Fast JSON parsing and generation
Description

A JSON parsing and generation library optimized for ease of use and high performance.

Parsing performance with GHC 6.12.3 on a late 2010 MacBook Pro (2.66GHz Core i7), for mostly-English tweets from Twitter's JSON search API:

  • English, 854 bytes: 29029 msg/sec (23.6 MB/sec)

  • English, 6.4 KB: 6407 msg/sec (40.3 MB/sec)

  • English, 31.2 KB: 1265 msg/sec (38.8 MB/sec)

  • English, 61.5 KB: 585 msg/sec (35.2 MB/sec)

Handling heavily-escaped text is a little more work. Here is parsing performance with Japanese tweets, where much of the text is entirely Unicode-escaped:

  • Japanese, 14.6 KB: 2227 msg/sec (31.9 MB/sec)

  • Japanese, 44.1 KB: 671 msg/sec (29.6 MB/sec)

Encoding performance on the same machine and data:

  • English, 854 bytes: 43439 msg/sec (35.4 MB/sec)

  • English, 6.4 KB: 7127 msg/sec (44.8 MB/sec)

  • Engish, 61.5 KB: 765 msg/sec (46.0 MB/sec)

  • Japanese, 14.6 KB: 4727 msg/sec (67.5 MB/sec)

  • Japanese, 44.1 KB: 1505 msg/sec (64.8 MB/sec)

With GHC 7.0.2, the story is mixed: parsing is 20-40% slower than GHC 6.12.3, while encoding performance ranges from about the same to twice as fast (on numeric data).

(A note on naming: in Greek mythology, Aeson was the father of Jason.)

Author
Bryan O'Sullivan <bos@mailrank.com>
Bug reports
http://github.com/mailrank/aeson/issues
Category
Text, Web, JSON
Copyright
Copyright 2011 MailRank, Inc.
Homepage
http://github.com/mailrank/aeson
Maintainer
Bryan O'Sullivan <bos@mailrank.com>
Package URL
n/a
Stability
experimental

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