[issue46971] python takes long time when return big data

[Hu Di]

New submission from Hu Di <476658825 at qq.com>:

it takes a long time when python return big data.
generally, when a function return something, it only take less than 1e-5 second,
but when the result is big, like np.random.rand(2048,3,224,224), the time cost will increase to 0.1-0.2 second

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Added file: https://bugs.python.org/file50665/python_performance_issue.py

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<https://bugs.python.org/issue46971>
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