Terry J. Reedy <tjre...@udel.edu> added the comment:
Side note: Windows requires that args be quoted with ", not ', to work
properly, at least with these args.
Main note: the patched test adds a space to the separator, but that is not
enough to account for the difference.
c:\Programs\Python32>python -m timeit -s "seq=[bytes([i]*1000) for i in
range(256)]" "b''.join(seq)"
10000 loops, best of 3: 31.7 usec per loop
c:\Programs\Python32>python -m timeit -s "seq=[bytes([i]*1000) for i in
range(256)]" "b' '.join(seq)"
10000 loops, best of 3: 34.1 usec per loop
The behavior change is wrong and test_bytes.py seems to need augmentation. It
begins with "XXX This is a mess. [...]".
class BaseBytesTest(unittest.TestCase):
def test_join(self)
tests b''.join([]) but as far as I can tell, not b'something'.join([]), the
failing case found by Serhiy.
It end with " # XXX more...".
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<http://bugs.python.org/issue12805>
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