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Diffstat (limited to 'Doc/library/io.rst')
| -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 a97fae0..26ddd8f 100644 --- a/Doc/library/io.rst +++ b/Doc/library/io.rst @@ -814,6 +814,8 @@ 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`. |