[issue7451] improve json decoding performance

[Antoine Pitrou]

Antoine Pitrou <pitrou at free.fr> added the comment:

Updated patch against py3k.

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stage: patch review -> commit review
versions:  -Python 2.7
Added file: http://bugs.python.org/file18755/json-opts4.patch

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue7451>
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