Message307404
The proposed PR rewrites the plistlib module using a functional style. This speeds up loading and saving plist files at least by 10%. Saving plist files in XML format have sped up almost twice.
$ ./python -m timeit -s 'import plistlib; a = list(range(100))' -- 'plistlib.dumps(a, fmt=plistlib.FMT_XML)'
Unpatched: 1000 loops, best of 5: 228 usec per loop
Patched: 1000 loops, best of 5: 204 usec per loop
$ ./python -m timeit -s 'import plistlib; a = list(range(100))' -- 'plistlib.dumps(a, fmt=plistlib.FMT_BINARY)'
Unpatched: 1000 loops, best of 5: 234 usec per loop
Patched: 1000 loops, best of 5: 203 usec per loop
$ ./python -m timeit -s 'import plistlib; a = list(range(100)); p = plistlib.dumps(a, fmt=plistlib.FMT_XML)' -- 'plistlib.loads(p)'
Unpatched: 1000 loops, best of 5: 308 usec per loop
Patched: 2000 loops, best of 5: 155 usec per loop
$ ./python -m timeit -s 'import plistlib; a = list(range(100)); p = plistlib.dumps(a, fmt=plistlib.FMT_BINARY)' -- 'plistlib.loads(p)'
Unpatched: 2000 loops, best of 5: 116 usec per loop
Patched: 5000 loops, best of 5: 94.6 usec per loop
$ ./python -m timeit -s 'import plistlib; a = {"a%d" % i: i for i in range(100)}' -- 'plistlib.dumps(a, fmt=plistlib.FMT_XML)'
Unpatched: 500 loops, best of 5: 433 usec per loop
Patched: 1000 loops, best of 5: 384 usec per loop
$ ./python -m timeit -s 'import plistlib; a = {"a%d" % i: i for i in range(100)}' -- 'plistlib.dumps(a, fmt=plistlib.FMT_BINARY)'
Unpatched: 500 loops, best of 5: 616 usec per loop
Patched: 500 loops, best of 5: 560 usec per loop
$ ./python -m timeit -s 'import plistlib; a = {"a%d" % i: i for i in range(100)}; p = plistlib.dumps(a, fmt=plistlib.FMT_XML)' -- 'plistlib.loads(p)'
Unpatched: 500 loops, best of 5: 578 usec per loop
Patched: 1000 loops, best of 5: 308 usec per loop
$ ./python -m timeit -s 'import plistlib; a = {"a%d" % i: i for i in range(100)}; p = plistlib.dumps(a, fmt=plistlib.FMT_BINARY)' -- 'plistlib.loads(p)'
Unpatched: 1000 loops, best of 5: 257 usec per loop
Patched: 1000 loops, best of 5: 208 usec per loop |
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Date |
User |
Action |
Args |
2017-12-01 19:28:36 | serhiy.storchaka | set | recipients:
+ serhiy.storchaka, ronaldoussoren |
2017-12-01 19:28:36 | serhiy.storchaka | set | messageid: <1512156516.89.0.213398074469.issue32196@psf.upfronthosting.co.za> |
2017-12-01 19:28:36 | serhiy.storchaka | link | issue32196 messages |
2017-12-01 19:28:36 | serhiy.storchaka | create | |
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