Lots of small changes, including this interesting one[1]. Why anyone was monkeypatching `len()` with a version wrapped in a `lru_cache` is beyond me! Another g

Lots of small changes, including this interesting one[1]. Why anyone was monkeypatching `len()` with a version wrapped in a `lru_cache` is beyond me! Another good one is this[2], which improves the speed of creating dictionary literals with constant keys by 30% (i.e {'a': 1, 'b': 2}. The full changelog is here: https://docs.python.org/3.6/whatsnew/changelog.html https://docs.python.org/3.6/whatsnew/changelog.html 1. https://bugs.python.org/issue28991 https://bugs.python.org/issue28991 2. https://bugs.python.org/issue28731 https://bugs.python.org/issue28731