[issue3974] collections.namedtuple uses exec to create new classes

[Antoine Pitrou]

Antoine Pitrou <pitrou at free.fr> added the comment:

Have you run benchmarks of both versions? It seems the benefit of the
original version is that it's faster, thanks to hardcoding critical methods.

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nosy: +pitrou

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<http://bugs.python.org/issue3974>
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