git@vger.kernel.org mailing list mirror (one of many)
 help / color / mirror / code / Atom feed
From: Junio C Hamano <gitster@pobox.com>
To: "Derrick Stolee via GitGitGadget" <gitgitgadget@gmail.com>
Cc: git@vger.kernel.org, Derrick Stolee <dstolee@microsoft.com>
Subject: Re: [PATCH] bloom: ignore renames when computing changed paths
Date: Wed, 08 Apr 2020 12:11:23 -0700	[thread overview]
Message-ID: <xmqqftddpzc4.fsf@gitster.c.googlers.com> (raw)
In-Reply-To: <pull.601.git.1586363907252.gitgitgadget@gmail.com> (Derrick Stolee via GitGitGadget's message of "Wed, 08 Apr 2020 16:38:27 +0000")

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

> From: Derrick Stolee <dstolee@microsoft.com>
>
> The changed-path Bloom filters record an entry in the filter for
> every path that was changed. This includes every add and delete,
> regardless of whther a rename was detected. Detecting renames
> causes significant performance issues, but also will trigger
> downloading missing blobs in partial clone.
>
> The simple fix is to disable rename detection when computing a
> changed-path Bloom filter.

Makes perfect sense to me.

> diff --git a/bloom.c b/bloom.c
> index c5b461d1cfe..dd9bab9bbd6 100644
> --- a/bloom.c
> +++ b/bloom.c
> @@ -189,6 +189,7 @@ struct bloom_filter *get_bloom_filter(struct repository *r,
>  
>  	repo_diff_setup(r, &diffopt);
>  	diffopt.flags.recursive = 1;
> +	diffopt.detect_rename = 0;
>  	diffopt.max_changes = max_changes;
>  	diff_setup_done(&diffopt);
>  
>
> base-commit: d5b873c832d832e44523d1d2a9d29afe2b84c84f

  reply	other threads:[~2020-04-08 19:11 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-08 16:38 [PATCH] bloom: ignore renames when computing changed paths Derrick Stolee via GitGitGadget
2020-04-08 19:11 ` Junio C Hamano [this message]
2020-04-08 19:13 ` Philip Oakley
2020-04-08 22:31 ` Jeff King
2020-04-09 11:56   ` Derrick Stolee
2020-04-09 13:47     ` Jeff King
2020-04-09 14:00       ` Derrick Stolee
2020-04-09 14:15         ` Jeff King
2020-04-09 13:00 ` [PATCH v2] " Derrick Stolee via GitGitGadget

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

  List information: http://vger.kernel.org/majordomo-info.html

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=xmqqftddpzc4.fsf@gitster.c.googlers.com \
    --to=gitster@pobox.com \
    --cc=dstolee@microsoft.com \
    --cc=git@vger.kernel.org \
    --cc=gitgitgadget@gmail.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
Code repositories for project(s) associated with this public inbox

	https://80x24.org/mirrors/git.git

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).