19.09.19 11:00, Greg Ewing пише:
Serhiy Storchaka wrote:
PyDict_Merge() is called every time when you have a call like `f(a=1,
**kw)`
So would not be worth to add slots for keys (and maybe for values and
items) to the tp_as_mapping structure?
Only if looking up those methods is taking a substantial proportion
of time. Measurements will be needed to find out.
I withdraw my proposition. "keys" is not a dunder name, so it should be
looked up in the instance, not in the class. It can't be cached.
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