I didn't mean that @test_array was modified; I meant that splice() modifies its argument array, requiring a temp copy be made. It just seemed wasteful to copy an array, and modify it, and then dispose of it, when Perl slice doesn't do so. Of course, that's pure guesswork on my part - and I haven't attempted to time it.
In your representation of Python vs Perl slicing & splicing, I didn't understand your notation OFFSET:LENGTH for Python. Python slices are OFFSET:OFFSET. (Which is why Perl slices seemed a better fit to me.) Could you clarify?
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