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| author | Victor Stinner <vstinner@redhat.com> | 2019-01-15 23:02:35 (GMT) |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2019-01-15 23:02:35 (GMT) |
| commit | 9daecf37a571e98aaf43a387bcc9e41a7132f477 (patch) | |
| tree | 845a37230f2a9d6eed12a4fc84727394ad323d68 /Doc/whatsnew | |
| parent | a37f52436f9aa4b9292878b72f3ff1480e2606c3 (diff) | |
| download | cpython-9daecf37a571e98aaf43a387bcc9e41a7132f477.zip cpython-9daecf37a571e98aaf43a387bcc9e41a7132f477.tar.gz cpython-9daecf37a571e98aaf43a387bcc9e41a7132f477.tar.bz2 | |
bpo-35537: subprocess uses os.posix_spawn in some cases (GH-11452)
The subprocess module can now use the os.posix_spawn() function
in some cases for better performance. Currently, it is only used on macOS
and Linux (using glibc 2.24 or newer) if all these conditions are met:
* executable path contains a directory
* close_fds=False
* preexec_fn, pass_fds, cwd, stdin, stdout, stderr
and start_new_session parameters are not set
Co-authored-by: Joannah Nanjekye <nanjekyejoannah@gmail.com>
Diffstat (limited to 'Doc/whatsnew')
| -rw-r--r-- | Doc/whatsnew/3.8.rst | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/Doc/whatsnew/3.8.rst b/Doc/whatsnew/3.8.rst index 370ef46..053fe90 100644 --- a/Doc/whatsnew/3.8.rst +++ b/Doc/whatsnew/3.8.rst @@ -275,6 +275,15 @@ xml Optimizations ============= +* The :mod:`subprocess` module can now use the :func:`os.posix_spawn` function + in some cases for better performance. Currently, it is only used on macOS + and Linux (using glibc 2.24 or newer) if all these conditions are met: + + * *close_fds* is false; + * *preexec_fn*, *pass_fds*, *cwd*, *stdin*, *stdout*, *stderr* and + *start_new_session* parameters are not set; + * the *executable* path contains a directory. + * :func:`shutil.copyfile`, :func:`shutil.copy`, :func:`shutil.copy2`, :func:`shutil.copytree` and :func:`shutil.move` use platform-specific "fast-copy" syscalls on Linux, macOS and Solaris in order to copy the file |