[$] Redesigning Python's named tuples

Deficiencies in the startup time forPython, along with the collections.namedtuple()data structurebeing identified as part of the problem, led Guido van Rossum to decree that named tuples should be optimized. That immediately set off amini-storm of thoughts about the data structure and how it might beredesigned in the original python-dev thread, but Van Rossum directedparticipants over to python-ideas, where a number of alternatives were discussed. Theyranged from straightforward tweaks to address the most pressing performanceproblems to elevating named tuples to be a new top-level datastructure-joining regular tuples, lists, sets, dictionaries, and so on.