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From: Max Kirillov <>
To: Michael Haggerty <>
Cc: Max Kirillov <>, Git List <>,
	Eric Sunshine <>
Subject: Re: [PATCH v2] pack-refs: fail on falsely sorted packed-refs
Date: Wed, 13 Feb 2019 06:23:07 +0200
Message-ID: <20190213042307.GA3064@jessie.local> (raw)
In-Reply-To: <>

On Mon, Feb 11, 2019 at 08:24:46PM +0100, Michael Haggerty wrote:
> The change to `write_with_updates()` doesn't only affect `pack-refs`.
> That function is also called when the `packed-refs` file has to be
> rewritten when a packed reference is deleted. This is another thing
> that you could test.

Ok, I'll check ti and add to the tests.

> But that also means that fairly common commands like `git branch -d`
> could be slowed down by this change. I doubt that the slowdown is
> prohibitive, but it would be great to see numbers to prove it. For
> example, create a repository with a lot (say 10000) references, pack
> them, then run `git branch -d` to delete one of them. Benchmark that
> once with master and once with your modification and document the
> difference.

At my hardware, with 1M references, "branch -d" takes 0.31s
of user time before change vs 0.38 after change. Should I
mention it in the commit message?

>> +test_expect_success 'off-order branch not found' '
>> +       test_must_fail git show-ref --verify --quiet refs/heads/b00
>> +'
> I don't think that the above test makes sense. We don't *guarantee*
> that an out-of-order reference won't be found. That is an
> implementation detail that we are free to change. I think that it
> would be OK to just omit this test.

Thanks, will remove this one

  parent reply index

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-01-30 23:13 [RFC PATCH] " Max Kirillov
2019-01-30 23:31 ` Eric Sunshine
2019-01-31  8:21   ` Max Kirillov
2019-02-08 21:22   ` [PATCH v2] " Max Kirillov
2019-02-08 21:40     ` Eric Sunshine
2019-02-13  4:24       ` Max Kirillov
     [not found]     ` <>
2019-02-13  4:23       ` Max Kirillov [this message]
2019-02-13 10:08 ` [RFC PATCH] " Ævar Arnfjörð Bjarmason
2019-02-13 10:56   ` SZEDER Gábor
2019-02-23  7:10     ` Max Kirillov
2019-02-14  6:06   ` Jeff King
2019-02-23  7:09   ` Max Kirillov

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