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Slot or not: higher performance custom objects in pure Python

Description

__slots__ are versatile for certain kinds of uses and users, if you know how they work.

At first glance, they seem like a free lunch, with improvements in both time and space. At second glance, they seem to have so many caveats to make them not worth using.

This talk is a deep dive into how __slots__ work, how to wring every benefit out, as well as the actual caveats and alternatives, with recommendations for writers of core libraries as well as end users.

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