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| author | Giampaolo Rodola <g.rodola@gmail.com> | 2018-11-12 14:18:15 (GMT) |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2018-11-12 14:18:15 (GMT) |
| commit | 19c46a4c96553b2a8390bf8a0e138f2b23e28ed6 (patch) | |
| tree | f8c59fab93db82769dc938e1c5f28961c165292c /Doc | |
| parent | cd449806fac1246cb7b4d392026fe6986ec01fb7 (diff) | |
| download | cpython-19c46a4c96553b2a8390bf8a0e138f2b23e28ed6.zip cpython-19c46a4c96553b2a8390bf8a0e138f2b23e28ed6.tar.gz cpython-19c46a4c96553b2a8390bf8a0e138f2b23e28ed6.tar.bz2 | |
bpo-33695 shutil.copytree() + os.scandir() cache (#7874)
Diffstat (limited to 'Doc')
| -rw-r--r-- | Doc/whatsnew/3.8.rst | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/Doc/whatsnew/3.8.rst b/Doc/whatsnew/3.8.rst index 91e0d5b..e5e6d4a5 100644 --- a/Doc/whatsnew/3.8.rst +++ b/Doc/whatsnew/3.8.rst @@ -277,6 +277,14 @@ Optimizations See :ref:`shutil-platform-dependent-efficient-copy-operations` section. (Contributed by Giampaolo Rodola' in :issue:`25427`.) +* :func:`shutil.copytree` uses :func:`os.scandir` function and all copy + functions depending from it use cached :func:`os.stat` values. The speedup + for copying a directory with 8000 files is around +9% on Linux, +20% on + Windows and +30% on a Windows SMB share. Also the number of :func:`os.stat` + syscalls is reduced by 38% making :func:`shutil.copytree` especially faster + on network filesystems. (Contributed by Giampaolo Rodola' in :issue:`33695`.) + + * The default protocol in the :mod:`pickle` module is now Protocol 4, first introduced in Python 3.4. It offers better performance and smaller size compared to Protocol 3 available since Python 3.0. |