bug#51883: 29.0.50; Command to get accidentally deleted frames back

[Stefan Monnier]

>> IIUC framesets are designed to be serializable so they shouldn't hold on
>> to external data like buffers and windows, so such 16 elements should
>> cost very little in terms of heap use.
> OTOH, since framesets are designed to be serializable, isn't it
> overkill to use framesets in the same session?

Not sure what you mean by "overkill".  AFAIK it makes them more lightweight.

> For example, `clone-frame` doesn't use framesets, and the effect of
> `clone-frame` should be the same as what `undelete-frame` does.

Except it actually creates a frame, so it requires a lot more resources.


        Stefan