Re: using tree as attribute source is slow, was Re: Help troubleshoot performance regression cloning with depth: git 2.44 vs git 2.42

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Taylor Blau <me@xxxxxxxxxxxx> writes:

> On Thu, May 02, 2024 at 10:44:20AM -0700, Junio C Hamano wrote:
>> Taylor Blau <me@xxxxxxxxxxxx> writes:
>>
>> > Instead, this patch changes the behavior to only fallback to "HEAD" in
>> > bare repositories from check-attr, but leaves pack-objects, archive, and
>> > all other builtins alone.
>>
>> I thought the whole point of the exercise was to allow server-side
>> (which typically is bare and cannot use anything from the working
>> tree) to pay attention to the attributes.  This patch rips that out
>> and piles even more new and unproven code on top?  I am not sure.
>
> I thought the point of John's patch was to allow just check-attr to read
> from HEAD^{tree} in bare repositories, and not to touch other commands.
>
> I could be misunderstanding the original intent of John's patch (the
> commit message there isn't clear whether the change was intended to
> target just check-attr or all of Git). But my hope is that it was the
> former, which this patch preserves.
>

>From the series [1] it becomes more clear that the intention was to
target all commands.

[1]: https://lore.kernel.org/git/pull.1577.v5.git.git.1697218770.gitgitgadget@xxxxxxxxx/

> I do not know whether servers should in general be trusting
> user-provided attributes for things like "delta".
>
> Thanks,
> Taylor

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