Re: preserve untracked cache, was Re: What's cooking in git.git (Jun 2017, #01; Thu, 1)

> Hi Junio,
>
> On Thu, 1 Jun 2017, Junio C Hamano wrote:
>
>> * dt/unpack-save-untracked-cache-extension (2017-05-20) 1 commit
>>   (merged to 'next' on 2017-05-23 at 3196d093d6)
>>  + unpack-trees: preserve index extensions
>>
>>  When "git checkout", "git merge", etc. manipulates the in-core
>>  index, various pieces of information in the index extensions are
>>  discarded from the original state, as it is usually not the case
>>  that they are kept up-to-date and in-sync with the operation on the
>>  main index.  The untracked cache extension is copied across these
>>  operations now, which would speed up "git status" (as long as the
>>  cache is properly invalidated).
>
> It was my understanding that Ben's analysis conclusively proved that the
> patch as well as the test are sound, and Dave agreed.
>
> What is holding this topic up? Anything Ben or I can do to move this
> closer to `next` or even `master`?