Created on 2011-04-16 12:19 by pitrou, last changed 2011-04-25 17:16 by pitrou. This issue is now closed.
| Files | ||||
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| File name | Uploaded | Description | Edit | |
| jsonnumbers.patch | pitrou, 2011-04-16 12:19 | review | ||
| jsonnumbers2.patch | pitrou, 2011-04-16 17:30 | review | ||
| Messages (4) | |||
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| msg133891 - (view) | Author: Antoine Pitrou (pitrou) *  |
Date: 2011-04-16 12:19 | |
In Python 3.x, parsing JSON numbers involve calling PyLong_FromUnicode or PyFloat_FromString with an unicode object. These functions are quite costly because they call PyUnicode_TransformDecimalToASCII(). But JSON numbers are always pure ASCII. This patch does the ASCII conversion ourselves. Small benchmark with integers: ./python -m timeit -s \ "from json import loads, dumps; d=list(i for i in range(1000)); s=dumps(d)" \ "loads(s)" -> without patch: 705 usec per loop -> with patch: 103 usec per loop |
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| msg133899 - (view) | Author: Antoine Pitrou (pitrou) * |
Date: 2011-04-16 17:30 | |
Cleaned up patch. |
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| msg134378 - (view) | Author: Jesús Cea Avión (jcea) * |
Date: 2011-04-25 11:21 | |
Patch seems OK. Please, commit. |
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| msg134396 - (view) | Author: Roundup Robot (python-dev) | Date: 2011-04-25 17:16 | |
New changeset d60f9d9983bb by Antoine Pitrou in branch 'default': Issue #11856: Speed up parsing of JSON numbers. http://hg.python.org/cpython/rev/d60f9d9983bb |
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| History | |||
|---|---|---|---|
| Date | User | Action | Args |
| 2011-04-25 17:16:39 | pitrou | set | status: open -> closed resolution: fixed stage: patch review -> resolved |
| 2011-04-25 17:16:20 | python-dev | set | nosy:
+ python-dev messages: + msg134396 |
| 2011-04-25 11:21:25 | jcea | set | nosy:
+ jcea messages: + msg134378 |
| 2011-04-16 17:30:25 | pitrou | set | files:
+ jsonnumbers2.patch messages: + msg133899 |
| 2011-04-16 12:20:02 | ezio.melotti | set | nosy:
+ ezio.melotti |
| 2011-04-16 12:19:20 | pitrou | create | |