[Python-ideas] Revised^4 PEP on yield-from
python at rcn.com
Wed Feb 25 20:47:13 CET 2009
>> The hasattr() tests can be expensive for repeated throwers and senders.
>> Any merit to caching the result of the test?
> The expansion is a specification of the semantics, not
> an implementation.
I would have thought that running hasattr() no more than
once is a semantic detail.
Also, speed is a relevant consideration whenever users
have the choice of continuing to do things the old way.
If the new syntax is slower for key use cases, why would
anyone adopt it?
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