Jeremy Hylton wrote at 2005-7-11 18:37 -0700:
>IIRC, the old implementation of savepoints kept a copy of the index at
>the time the savepoint was taken so that you could rollback to it
>multiple times.  I don't think there's any way to avoid such a copy.

Maybe, we keep the original implementation (a savepoint restore
deletes this savepoint) and update the docstring?

It is rare that we need to keep the savepoint.
If we do, we can (usually) create a one with the state
after the "restore".

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