Xiang Zhang added the comment:
python -> unpatched, python3 -> patched
iterkeys:
(split)
./python3 -m perf timeit --compare-to /home/angwer/cpython/python -s 'from
argparse import Namespace; ns = Namespace(); [setattr(ns, str(i), str(i)) for i
in range(10000)]' 'list(iter(ns.__dict__))'
python: ..................... 112 us +- 1 us
python3: ..................... 109 us +- 1 us
Median +- std dev: [python] 112 us +- 1 us -> [python3] 109 us +- 1 us: 1.03x
faster
(combined)
./python3 -m perf timeit --compare-to /home/angwer/cpython/python -s 'd = {x:x
for x in range(10000)}' 'list(iter(d))'python: ..................... 84.3 us +-
2.4 us
python3: ..................... 86.0 us +- 3.5 us
Median +- std dev: [python] 84.3 us +- 2.4 us -> [python3] 86.0 us +- 3.5 us:
1.02x slower
pydict_next:
(split)
./python3 -m perf timeit --compare-to /home/angwer/cpython/python -s 'from
argparse import Namespace; ns = Namespace(); [setattr(ns, str(i), str(i)) for i
in range(10000)]' 'repr(ns.__dict__)'
python: ..................... 1.85 ms +- 0.01 ms
python3: ..................... 1.85 ms +- 0.11 ms
Median +- std dev: [python] 1.85 ms +- 0.01 ms -> [python3] 1.85 ms +- 0.11 ms:
1.00x faster
(combined)
./python3 -m perf timeit --compare-to /home/angwer/cpython/python -s 'd = {x:x
for x in range(10000)}' 'repr(d)'
python: ..................... 1.99 ms +- 0.01 ms
python3: ..................... 1.87 ms +- 0.01 ms
Median +- std dev: [python] 1.99 ms +- 0.01 ms -> [python3] 1.87 ms +- 0.01 ms:
1.06x faster
----------
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<http://bugs.python.org/issue28580>
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