Pyo3: Opt-out of `PyCell`

Created on 26 Jul 2020  路  2Comments  路  Source: PyO3/pyo3

Like we have #[pyclass(unsendable)] to opt-out of Send, many users will not want their pyclass to be mutable. It would be nice if we could allow them to opt-out of having PyCell as the backend, so that they don't have to deal with the performance cost.

needs-design performance
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picture davidhewitt

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Could we couch this in terms of exclusive and non-exclusive access rather than mutability?

picture gilescope on 7 Aug 2020
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Perhaps this opt-out could be #[pyclass(immutable)] ?

Though TBH I think I prefer immutable-by-default, so perhaps we should have #[pyclass(mutable)] to opt-in to PyCell!

davidhewitt picture davidhewitt on 26 Jul 2020
👍1

Could we couch this in terms of exclusive and non-exclusive access rather than mutability?

gilescope picture gilescope on 7 Aug 2020
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