Message165935
| Author |
pitrou |
| Recipients |
Arfrever, eli.bendersky, jcon, meador.inge, ncoghlan, pitrou, serhiy.storchaka, tshepang |
| Date |
2012年07月20日.15:03:27 |
| SpamBayes Score |
-1.0 |
| Marked as misclassified |
Yes |
| Message-id |
<1342796608.8.0.788759810799.issue15381@psf.upfronthosting.co.za> |
| In-reply-to |
| Content |
There seems to be a problem with the patch: when you store the getvalue() result somewhere (instead of discarding it), things get much slower:
$ ./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)" "s.getvalue()"
1000 loops, best of 3: 913 usec per loop
$ ./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()"
100 loops, best of 3: 4.67 msec per loop
This does not happen without the patch. |
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