[issue36051] Drop the GIL during large bytes.join operations?

[Bruce Merry]

Bruce Merry <bmerry at gmail.com> added the comment:

> It seems we can release GIL during iterating the buffer array.

That's what I had in mind. Naturally it would require a bit of benchmarking to pick a threshold such that the small case doesn't lose performance due to locking overheads. If no one else is working on it, I can give that a try early next year.

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