Message166008
| Author |
pitrou |
| Recipients |
Arfrever, eli.bendersky, jcon, meador.inge, ncoghlan, pitrou, serhiy.storchaka, tshepang |
| Date |
2012年07月21日.10:37:26 |
| SpamBayes Score |
-1.0 |
| Marked as misclassified |
Yes |
| Message-id |
<1342867047.2.0.549556856417.issue15381@psf.upfronthosting.co.za> |
| In-reply-to |
| Content |
StringIO:
$ ./python -m timeit -s "import io; n=2000; d=['a'*n,'bb'*n,'ccc'*n]*1000" "s=io.StringIO(); w=s.write" "for x in d: w(x)" "global y; y = s.getvalue()"
-> Linux: 1000 loops, best of 3: 985 usec per loop
-> Windows: 100 loops, best of 3: 4.26 msec per loop
Unpatched BytesIO:
$ ./python -m timeit -s "import io; n=2000; d=[b'a'*n,b'bb'*n,b'ccc'*n]*1000" "s=io.BytesIO(); w=s.write" "for x in d: w(x)" "global y; y = s.getvalue()"
-> Linux: 100 loops, best of 3: 2.44 msec per loop
-> Windows: 10 loops, best of 3: 38.4 msec per loop
b''.join():
$ ./python -m timeit -s "import io; n=2000; d=[b'a'*n,b'bb'*n,b'ccc'*n]*1000" "l = list(d)" "global y; y = b''.join(l)"
-> Linux: 1000 loops, best of 3: 821 usec per loop
-> Windows: 100 loops, best of 3: 4.09 msec per loop
bytearray:
$ ./python -m timeit -s "import io; n=2000; d=[b'a'*n,b'bb'*n,b'ccc'*n]*1000" "b = bytearray()" "for x in d: b += x" "global y; y = b"
-> Linux: 1000 loops, best of 3: 834 usec per loop
-> Windows: 10 loops, best of 3: 37.8 msec per loop |
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