[issue28638] Optimize namedtuple creation

[Raymond Hettinger]

Raymond Hettinger added the comment:

Re-opening per discussion on python-dev.

Goals:

* Extend Jelle's patch to incorporate lazy support for "_source" and "verbose" so that the API is unchanged from the user's point of view.

* Make sure the current test suite still passes and that the current docs remain valid.

* Get better measurements of benefits so we know what is actually being achieved.

* Test to see if there are new positive benefits for PyPy and Jython as well.

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resolution: rejected -> 
status: closed -> open

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue28638>
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