Re: [PATCH] describe: dont abort too early when searching tags

> From: Benno Evers <benno@bmevers.de>
>
>> How much, if any, does this change hurt the performance by forcing
>> the code to dig further if there aren't multiple roots?  If there is
>> such an unnecessary overhead that degrades performance for the more
>> common case, can we improve it further to avoid it?
>
> If there aren't multiple roots, then this should be visiting exactly
> the same number of commits as before. This is because in this case, if
> we're down to a single branch, the current commit must be an ancestor
> of *all* tag candidates so the stopping condition is always true.