Mirror
/
cpython
mirror of https://github.com/python/cpython
4
1
Fork 0
Code Issues Releases Wiki Activity

Merged revisions 88334 via svnmerge from 

svn+ssh://pythondev@svn.python.org/python/branches/py3k

........
  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.
........
This commit is contained in:
Antoine Pitrou 2011-02-04 20:17:40 +00:00
parent f60b4852da
commit 8e0ef58f30
1 changed files with 2 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
Doc/library/io.rst
View File

@ -796,6 +796,8 @@ 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`.