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| author | Antoine Pitrou <solipsis@pitrou.net> | 2011-02-04 20:17:53 (GMT) |
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| committer | Antoine Pitrou <solipsis@pitrou.net> | 2011-02-04 20:17:53 (GMT) |
| commit | 893e7c61845ab2d5ee8671a9337669ca53cd1f05 (patch) | |
| tree | a869357d5662194d93e3da017b59f942414d0ddf /Doc/library | |
| parent | 54274ad96aa033b9f3744dce395d08047467cca9 (diff) | |
| download | cpython-893e7c61845ab2d5ee8671a9337669ca53cd1f05.zip cpython-893e7c61845ab2d5ee8671a9337669ca53cd1f05.tar.gz cpython-893e7c61845ab2d5ee8671a9337669ca53cd1f05.tar.bz2 | |
Merged revisions 88334 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/branches/py3k
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r88334 | antoine.pitrou | 2011-02-04 21:11:11 +0100 (ven., 04 févr. 2011) | 3 lines
Mention that seek and tell over a TextIOWrapper can be very slow.
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Diffstat (limited to 'Doc/library')
| -rw-r--r-- | Doc/library/io.rst | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/Doc/library/io.rst b/Doc/library/io.rst index e3c7103..3cfaaed 100644 --- a/Doc/library/io.rst +++ b/Doc/library/io.rst @@ -812,6 +812,8 @@ Text I/O over a binary storage (such as a file) is significantly slower than binary I/O over the same storage, because it implies conversions from unicode to binary data using a character codec. This can become noticeable if you handle huge amounts of text data (for example very large log files). +Also, :meth:`TextIOWrapper.tell` and :meth:`TextIOWrapper.seek` are both +quite slow due to the reconstruction algorithm used. :class:`StringIO`, however, is a native in-memory unicode container and will exhibit similar speed to :class:`BytesIO`. |