Stefan Behnel added the comment:

> why you pass through fast path only if -1<= Py_SIZE(v) <=1?

It's usually enough, it's the fastest fast path, and it doesn't even need
error handling.

Any slicing where the slice calculation time matters is going to be of
fairly limited size, often involving the values (!) 1 or -1 in the slice
object fields, but definitely small integers.

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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue18813>
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