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| author | Raymond Hettinger <rhettinger@users.noreply.github.com> | 2019-02-16 20:02:22 (GMT) |
|---|---|---|
| committer | Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com> | 2019-02-16 20:02:22 (GMT) |
| commit | 63fa1cfece4912110ce3a0ff11fb3ade3ff5e756 (patch) | |
| tree | 44f43ca234889b6884727c2411aca454b35626dc /Doc | |
| parent | 3ff5962d2e9af2c35d09d39465397c6fa6e9965c (diff) | |
| download | cpython-63fa1cfece4912110ce3a0ff11fb3ade3ff5e756.zip cpython-63fa1cfece4912110ce3a0ff11fb3ade3ff5e756.tar.gz cpython-63fa1cfece4912110ce3a0ff11fb3ade3ff5e756.tar.bz2 | |
bpo-32492: Add missing whatsnew entries for itemgetter and namedtuple (GH-11897)
https://bugs.python.org/issue32492
Diffstat (limited to 'Doc')
| -rw-r--r-- | Doc/whatsnew/3.8.rst | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/Doc/whatsnew/3.8.rst b/Doc/whatsnew/3.8.rst index 632c2a8..5d2451b 100644 --- a/Doc/whatsnew/3.8.rst +++ b/Doc/whatsnew/3.8.rst @@ -359,6 +359,17 @@ Optimizations * :class:`uuid.UUID` now uses ``__slots__`` to reduce its memory footprint. +* Improved performance of :func:`operator.itemgetter` by 33%. Optimized + argument handling and added a fast path for the common case of a single + non-negative integer index into a tuple (which is the typical use case in + the standard library). (Contributed by Raymond Hettinger in + :issue:`35664`.) + +* Sped-up field lookups in :func:`collections.namedtuple`. They are now more + than two times faster, making them the fastest form of instance variable + lookup in Python. (Contributed by Raymond Hettinger, Pablo Galindo, and + Serhiy Storchaka in :issue:`32492`.) + * The :class:`list` constructor does not overallocate the internal item buffer if the input iterable has a known length (the input implements ``__len__``). This makes the created list 12% smaller on average. (Contributed by Pablo |