Stefan Krah <stefan-use...@bytereef.org> added the comment: Kristján, I ran the benchmarks from http://bugs.python.org/issue10227#msg143731 in the current cpython and pep-3118 repos. In both cases the differences between Linux and Windows are far less pronounced than they used to be. All benchmarks were run with the x64 builds.
I also ran the profile guided optimization build for Visual Studio. The results are equal to (or better than) the non-pgo gcc results. In my experience Visual Studio relies heavily on PGO for x64 builds. The default optimizer is just not as good as gcc's. If you can reproduce similar results, I think we can close this issue. ./python -m timeit -n 10000000 -s "x = ((b'x'*10000))" "x[:100]" linux-cpython (4244e4348362): 0.102 usec linux-pep-3118 (memoryview:534f6bbe5422): 0.098 usec windows-cpython: 0.109 usec windows-pep-3118: 0.112 usec usec windows-pep-3118-pgo: 0.103 usec ./python -m timeit -n 10000000 -s "x = (bytearray(b'x'*10000))" "x[:100]" linux-cpython (4244e4348362): 0.107 usec linux-pep-3118 (memoryview:534f6bbe5422): 0.109 usec windows-cpython: 0.127 usec windows-pep-3118: 0.128 usec windows-pep-3118-pgo: 0.106 usec ./python -m timeit -n 10000000 -s "x = memoryview(bytearray(b'x'*10000))" "x[:100]" linux-cpython (4244e4348362): 0.127 usec linux-pep-3118 (memoryview:534f6bbe5422): 0.12 usec windows-cpython: 0.145 usec windows-pep-3118: 0.14 usec windows-pep-3118-pgo: 0.0984 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