Antoine Pitrou added the comment:
Updated patch, also optimizing v6 netmask parsing (same principle).
Before patch:
$ ./python -m timeit -s "import ipaddress" "net =
ipaddress.IPv6Network(('2001:db8::', 96))"
10000 loops, best of 3: 26.1 usec per loop
$ ./python -m timeit -s "import ipaddress" "net =
ipaddress.IPv4Network(('10.0.0.0', 23))"
100000 loops, best of 3: 17 usec per loop
After patch:
$ ./python -m timeit -s "import ipaddress" "net =
ipaddress.IPv6Network(('2001:db8::', 96))"
100000 loops, best of 3: 13.8 usec per loop
$ ./python -m timeit -s "import ipaddress" "net =
ipaddress.IPv4Network(('10.0.0.0', 23))"
100000 loops, best of 3: 14.3 usec per loop
----------
title: optimize v4 netmask parsing -> optimize v4 & v6 netmask parsing
Added file: http://bugs.python.org/file35232/netmask.patch
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