penguin_wwy <940375...@qq.com> added the comment:
The point of bpo-40369 issue seems to be to provide vectorcall to the
`GenericAliasType`, means vectorcall for `Queue[int]`
However, my idea is to add vectorcall to gaobject, like this:
```
d = dict[int]
d(a=1, b=2) <-- vectorcall
```
The idea came from my desire to implement different subclasses of a type when
implementing some kind of factory model：
```
class ChildClassBuilder:
...
def set_type(self, t: Type):
self.t = t
def build():
instance = self.t()
...
return instance
```
In the case of high type-hint coverage, the `self.t` is often a gaobject.
Benchmark example：
```
def test():
d = dict[int]
for _ in range(1000000):
d(a=1, b=2)
```
Speedup 20% in my wsl2
```
opt:
ncalls tottime percall cumtime percall filename:lineno(function)
1 0.000 0.000 1.728 1.728 <string>:1(<module>)
1 1.728 1.728 1.728 1.728 test.py:4(test)
master:
ncalls tottime percall cumtime percall filename:lineno(function)
1 0.000 0.000 2.271 2.271 <string>:1(<module>)
1 2.271 2.271 2.271 2.271 test.py:4(test)
```
----------
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue47067>
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