Re: [PATCH] branch: let --delete-merged find squash merged branches

[Phillip Wood <phillip.wood123@gmail.com>]

Hi Harald

On 04/10/2026 23:28, Harald Nordgren wrote:
> ...
>> If you know your repository only has squash merges that were not rebased
>> it would be a lot more efficient to just look at the trees and
>> merge-bases, especially in a blobless clone. Having an option to turn
>> off the patch-id based detection would probably be useful in that case.
> 
> Maybe yes, but for users I imagine they want the interface to be as
> simple as possible.

Agreed, they also don't want to wait to find squashed merges they know 
they do not have.

> I'm iterating on the code on my side (sharing logic between branches,
> etc) and it became fast on my local Git repo. If there are no
> performance concerns then would we still want the option to turn it
> off?

Even an efficient implementation is going to be a lot slower when it is 
trying to find branches that have been squashed, so I think we probably 
do want a way to turn it off. That's especially true in partial clones 
where we'll have to download a bunch of blobs to do the squash 
detection. So long as it isn't diabolically slow enabling it by default 
is probably fine.

Thanks

Phillip