[FFI] Randint

[barry-jin]

Description

Adopt packedfunc FFI on np.random.randint

setup = """
from mxnet import np, npx
npx.set_np()
"""
stmt = """
np.random.randint(1, 5)
"""
timer = timeit.Timer(setup=setup,
                     stmt=stmt)
num_repeat = 1000
print(min(timer.repeat(repeat=10, number=num_repeat)) / num_repeat)

legacy
0.0001447113919999996
New FFI
8.425812599999994e-05

Checklist

Essentials

• PR's title starts with a category (e.g. [BUGFIX], [MODEL], [TUTORIAL], [FEATURE], [DOC], etc)
• Changes are complete (i.e. I finished coding on this PR)
• All changes have test coverage
• Code is well-documented

Changes

• Feature1, tests, (and when applicable, API doc)
• Feature2, tests, (and when applicable, API doc)

Comments

• If this change is a backward incompatible change, why must this change be made.
• Interesting edge cases to note here

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