| non port: lang/python35/files/patch-Modules___posixsubprocess.c |
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Number of commits found: 1 |
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Fri, 29 Nov 2019
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[ 10:55 koobs  ]   (Only the first 10 of 14 ports in this commit are shown above.  )
lang/python{27,35,36,37,38}: Add closefrom(2) support
A single close(fd) syscall is cheap, but when MAXFDS (maximum file
descriptor number) is high, the loop calling close(fd) on each file
descriptor can take several milliseconds.
The default value of subprocess.Popen "close_fds" parameter changed to True
in Python 3. Compared to Python 2, close_fds=True can make Popen 10x
slower: see bpo-37790 [1]
The present workaround on FreeBSD to improve performance is to load and
mount the fdescfs kernel module, but this is not enabled by default.
This change adds minimum viable (and upstreamable) closefrom(2) syscall
support to Python's subprocess and posix modules, improving performance(Only the first 15 lines of the commit message are shown above )
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Number of commits found: 1 |
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