49 lines
1.0 KiB
Python
49 lines
1.0 KiB
Python
import perf
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import abc
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import numpy as np
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class NotArray:
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pass
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class AttrArray:
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__array_implementer__ = True
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class ArrayBase(abc.ABC):
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pass
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class ABCArray1(ArrayBase):
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pass
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class ABCArray2:
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pass
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ArrayBase.register(ABCArray2)
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not_array = NotArray()
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attr_array = AttrArray()
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abc_array_1 = ABCArray1()
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abc_array_2 = ABCArray2()
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# Make sure ABC cache is primed
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isinstance(not_array, ArrayBase)
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isinstance(abc_array_1, ArrayBase)
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isinstance(abc_array_2, ArrayBase)
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runner = perf.Runner()
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def t(name, statement):
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runner.timeit(name, statement, globals=globals())
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t("np.asarray([])", "np.asarray([])")
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arrobj = np.array([])
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t("np.asarray(arrobj)", "np.asarray(arrobj)")
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t("attr, False",
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"getattr(not_array, '__array_implementer__', False)")
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t("attr, True",
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"getattr(attr_array, '__array_implementer__', False)")
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t("ABC, False", "isinstance(not_array, ArrayBase)")
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t("ABC, True, via inheritance", "isinstance(abc_array_1, ArrayBase)")
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t("ABC, True, via register", "isinstance(abc_array_2, ArrayBase)")
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