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From: Junio C Hamano <gitster@pobox.com>
To: "Derrick Stolee via GitGitGadget" <gitgitgadget@gmail.com>
Cc: git@vger.kernel.org, "Michael Haggerty" <mhagger@alum.mit.edu>,
	me@ttaylorr.com, peff@peff.net, "René Scharfe" <l.s.r@web.de>,
	"Derrick Stolee" <stolee@gmail.com>,
	"Derrick Stolee" <derrickstolee@github.com>,
	"Derrick Stolee" <dstolee@microsoft.com>
Subject: Re: [PATCH v2 1/5] commit-reach: reduce requirements for remove_redundant()
Date: Mon, 01 Feb 2021 11:51:52 -0800	[thread overview]
Message-ID: <xmqqmtwnlg6f.fsf@gitster.c.googlers.com> (raw)
In-Reply-To: <649f6799e6bfa0662ed5a4debf915053598fe142.1612183647.git.gitgitgadget@gmail.com> (Derrick Stolee via GitGitGadget's message of "Mon, 01 Feb 2021 12:47:23 +0000")

"Derrick Stolee via GitGitGadget" <gitgitgadget@gmail.com> writes:

> From: Derrick Stolee <dstolee@microsoft.com>
>
> Remove a comment at the beggining of remove_redundant() that mentions a
> reordering of the input array to have the initial segment be the
> independent commits and the final segment be the redundant commits.
> While this behavior is followed in remove_redundant(), no callers rely
> on that behavior.
>
> Remove the final loop that copies this final segment and update the
> comment to match the new behavior.
>
> Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
> ---

Makes sense, especially since this is a file-local/static helper
function, we have reasonably tight control over its callers.

Will queue.  Thanks.

>  commit-reach.c | 10 ++++------
>  1 file changed, 4 insertions(+), 6 deletions(-)
>
> diff --git a/commit-reach.c b/commit-reach.c
> index e38771ca5a1..9af51fe7e07 100644
> --- a/commit-reach.c
> +++ b/commit-reach.c
> @@ -160,9 +160,10 @@ static int remove_redundant(struct repository *r, struct commit **array, int cnt
>  {
>  	/*
>  	 * Some commit in the array may be an ancestor of
> -	 * another commit.  Move such commit to the end of
> -	 * the array, and return the number of commits that
> -	 * are independent from each other.
> +	 * another commit.  Move the independent commits to the
> +	 * beginning of 'array' and return their number. Callers
> +	 * should not rely upon the contents of 'array' after
> +	 * that number.
>  	 */
>  	struct commit **work;
>  	unsigned char *redundant;
> @@ -209,9 +210,6 @@ static int remove_redundant(struct repository *r, struct commit **array, int cnt
>  	for (i = filled = 0; i < cnt; i++)
>  		if (!redundant[i])
>  			array[filled++] = work[i];
> -	for (j = filled, i = 0; i < cnt; i++)
> -		if (redundant[i])
> -			array[j++] = work[i];
>  	free(work);
>  	free(redundant);
>  	free(filled_index);

  reply	other threads:[~2021-02-01 19:54 UTC|newest]

Thread overview: 36+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-28 16:24 [PATCH 0/3] Speed up remove_redundant() Derrick Stolee via GitGitGadget
2021-01-28 16:24 ` [PATCH 1/3] commit-reach: use one walk in remove_redundant() Derrick Stolee via GitGitGadget
2021-01-28 20:51   ` Junio C Hamano
2021-01-29 17:11     ` René Scharfe
2021-01-31  3:52       ` Derrick Stolee
2021-01-31 10:20         ` René Scharfe
2021-01-31  3:59     ` Derrick Stolee
2021-01-31 20:13       ` Derrick Stolee
2021-01-31 20:25       ` Junio C Hamano
2021-02-01  3:55         ` Derrick Stolee
2021-01-29 17:10   ` René Scharfe
2021-01-28 16:24 ` [PATCH 2/3] commit-reach: move compare_commits_by_gen Derrick Stolee via GitGitGadget
2021-01-28 16:24 ` [PATCH 3/3] commit-reach: use heuristic in remove_redundant() Derrick Stolee via GitGitGadget
2021-01-28 20:20 ` [PATCH 0/3] Speed up remove_redundant() Junio C Hamano
2021-02-01 12:47 ` [PATCH v2 0/5] " Derrick Stolee via GitGitGadget
2021-02-01 12:47   ` [PATCH v2 1/5] commit-reach: reduce requirements for remove_redundant() Derrick Stolee via GitGitGadget
2021-02-01 19:51     ` Junio C Hamano [this message]
2021-02-01 12:47   ` [PATCH v2 2/5] commit-reach: use one walk in remove_redundant() Derrick Stolee via GitGitGadget
2021-02-01 16:12     ` René Scharfe.
2021-02-01 16:31       ` Derrick Stolee
2021-02-01 12:47   ` [PATCH v2 3/5] commit-reach: move compare_commits_by_gen Derrick Stolee via GitGitGadget
2021-02-01 12:47   ` [PATCH v2 4/5] commit-reach: use heuristic in remove_redundant() Derrick Stolee via GitGitGadget
2021-02-01 20:05     ` Junio C Hamano
2021-02-01 21:02       ` Derrick Stolee
2021-02-01 12:47   ` [PATCH v2 5/5] commit-reach: stale commits may prune generation further Derrick Stolee via GitGitGadget
2021-02-03 15:59     ` Taylor Blau
2021-02-01 15:48   ` [PATCH v2 0/5] Speed up remove_redundant() Derrick Stolee
2021-02-18 23:25     ` Junio C Hamano
2021-02-19 12:17       ` Derrick Stolee
2021-02-20  3:32         ` Junio C Hamano
2021-02-19 12:34   ` [PATCH v3 " Derrick Stolee via GitGitGadget
2021-02-19 12:34     ` [PATCH v3 1/5] commit-reach: reduce requirements for remove_redundant() Derrick Stolee via GitGitGadget
2021-02-19 12:34     ` [PATCH v3 2/5] commit-reach: use one walk in remove_redundant() Derrick Stolee via GitGitGadget
2021-02-19 12:34     ` [PATCH v3 3/5] commit-reach: move compare_commits_by_gen Derrick Stolee via GitGitGadget
2021-02-19 12:34     ` [PATCH v3 4/5] commit-reach: use heuristic in remove_redundant() Derrick Stolee via GitGitGadget
2021-02-19 12:34     ` [PATCH v3 5/5] commit-reach: stale commits may prune generation further Derrick Stolee via GitGitGadget

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