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Created on 2006-05-23 16:47 by bob.ippolito, last changed 2022-04-11 14:56 by admin. This issue is now closed.
| Files | ||||
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| File name | Uploaded | Description | Edit | |
| bippolito-newstruct-46117.diff | bob.ippolito, 2006-05-23 16:47 | |||
| Messages (3) | |||
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| msg50335 - (view) | Author: Bob Ippolito (bob.ippolito) *  |
Date: 2006-05-23 16:47 | |
This patch refactors the struct module to work like the re module:
compile and cache the format in advance. This seems to yield at least a
20% performance improvement on Mac OS X i386, depending on the
length of the format string.
$ ./python-orig/_build/python.exe -mtimeit -s "import struct; s = '\x00'
* 16" "struct.unpack('>iId', s); struct.unpack('iId', s); struct.unpack('<iId',
s)"
100000 loops, best of 3: 4.48 usec per loop
$ ./bippolito-newstruct/_build/python.exe -mtimeit -s "import struct; s
= '\x00' * 16" "struct.unpack('>iId', s); struct.unpack('iId', s);
struct.unpack('<iId', s)"
100000 loops, best of 3: 3.54 usec per loop
It also adds a struct.Struct type, which is even faster to use than the pack/
unpack/calcsize functions since it doesn't need to look anything up in the
cache.
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| msg50336 - (view) | Author: Bob Ippolito (bob.ippolito) * |
Date: 2006-05-23 18:48 | |
Logged In: YES user_id=139309 Applied in revision 46134 |
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| msg50337 - (view) | Author: Bob Ippolito (bob.ippolito) * |
Date: 2006-05-24 09:27 | |
Logged In: YES user_id=139309 Documentation for the new API in this patch is in: http://python.org/sf/1494140 |
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| History | |||
|---|---|---|---|
| Date | User | Action | Args |
| 2022-04-11 14:56:17 | admin | set | github: 43399 |
| 2006-05-23 16:47:34 | bob.ippolito | create | |