Serhiy Storchaka <storch...@gmail.com> added the comment: I am not see that BytesIO is slower than StringIO (both are about 30% slower than append/join).
$ ./python -m timeit -s "import io; d=[b'a'*10,b'bb'*5,b'ccc'*5]*1000" "b=[]; w=b.append" "for x in d: w(x)" "b''.join(b)" 1000 loops, best of 3: 966 usec per loop $ ./python -m timeit -s "import io; d=['a'*10,'bb'*5,'ccc'*5]*1000" "b=[]; w=b.append" "for x in d: w(x)" "''.join(b)" 1000 loops, best of 3: 918 usec per loop $ ./python -m timeit -s "import io; d=[b'a'*10,b'bb'*5,b'ccc'*5]*1000" "b=io.BytesIO(); w=b.write" "for x in d: w(x)" "b.getvalue()" 1000 loops, best of 3: 1.22 msec per loop $ ./python -m timeit -s "import io; d=['a'*10,'bb'*5,'ccc'*5]*1000" "b=io.StringIO(); w=b.write" "for x in d: w(x)" "b.getvalue()" 1000 loops, best of 3: 1.24 msec per loop ---------- nosy: +storchaka _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue15381> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
