Stefan Krah <stefan-use...@bytereef.org> added the comment: I see. I thought this was mainly about memoryview performance, so I did not specifically look at bytearray. The poor performance seems to be Windows specific:
C:\Users\stefan\hg\pep-3118\PCbuild>amd64\python.exe -m timeit -n 10000000 -s "x = ((b'x'*10000))" "x[:100]" 10000000 loops, best of 3: 0.118 usec per loop C:\Users\stefan\hg\pep-3118\PCbuild>amd64\python.exe -m timeit -n 10000000 -s "x = (bytearray(b'x'*10000))" "x[:100]" 10000000 loops, best of 3: 0.191 usec per loop C:\Users\stefan\hg\pep-3118\PCbuild>amd64\python.exe -m timeit -n 10000000 -s "x = memoryview(bytearray(b'x'*10000))" "x[:100]" 10000000 loops, best of 3: 0.146 usec per loop Linux: bytes: 10.9 usec bytearray: 0.14 usec memoryview: 0.14 usec ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue10227> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
