As we know, Python will support [pattern matching](https://www.python.org/dev/peps/pep-0634/) in 3.10. Putting usage and syntax aside, I can't seem to find any word about performance in the PEP, or the [official tutorial](https://www.python.org/dev/peps/pep-0636/).

So I'm wondering, how performant is it? Is it O(1) or the same as `if..elif..else`?