[issue44711] Optimize type check in pipes.py

[Ma Lin]

Ma Lin <malincns at 163.com> added the comment:

> I suppose it is a very old code

I also found a few old code may have performance loss.

memoryview.cast() method was add in Python 3.3.
This code doesn't use memoryview.cast(), which will bring extra memory overhead when the amount of data is very large.
https://github.com/python/cpython/blob/v3.10.0b4/Lib/multiprocessing/connection.py#L190-L194

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nosy: +malin

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