From: "Nguyễn Thái Ngọc Duy" <pclouds@gmail.com>
To: pclouds@gmail.com
Cc: git@vger.kernel.org, gitster@pobox.com, peff@peff.net
Subject: [PATCH v3 15/15] commit.h: delete 'util' field in struct commit
Date: Sat, 19 May 2018 07:28:31 +0200 [thread overview]
Message-ID: <20180519052831.12603-16-pclouds@gmail.com> (raw)
In-Reply-To: <20180519052831.12603-1-pclouds@gmail.com>
If you have come this far, you probably have seen that this 'util'
pointer is used for many different purposes. Some are not even
contained in a command code, but buried deep in common code with no
clue who will use it and how.
The move to using commit-slab gives us a much better picture of how
some piece of data is associated with a commit and what for. Since
nobody uses 'util' pointer anymore, we can retire so that nobody will
abuse it again. commit-slab will be the way forward for associating
data to a commit.
As a side benefit, this shrinks struct commit by 8 bytes (on 64-bit
architecture) which should help reduce memory usage for reachability
test a bit. This is also what commit-slab is invented for [1].
[1] 96c4f4a370 (commit: allow associating auxiliary info on-demand -
2013-04-09)
---
commit.h | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/commit.h b/commit.h
index 838f6a6b26..4432458367 100644
--- a/commit.h
+++ b/commit.h
@@ -16,9 +16,13 @@ struct commit_list {
struct commit_list *next;
};
+/*
+ * The size of this struct matters in full repo walk operations like
+ * 'git clone' or 'git gc'. Consider using commit-slab to attach data
+ * to a commit instead of adding new fields here.
+ */
struct commit {
struct object object;
- void *util;
unsigned int index;
timestamp_t date;
struct commit_list *parents;
--
2.17.0.705.g3525833791
next prev parent reply other threads:[~2018-05-19 5:29 UTC|newest]
Thread overview: 82+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-12 8:00 [PATCH 00/12] Die commit->util, die! Nguyễn Thái Ngọc Duy
2018-05-12 8:00 ` [PATCH 01/12] blame: use commit-slab for blame suspects instead of commit->util Nguyễn Thái Ngọc Duy
2018-05-12 9:22 ` Jeff King
2018-05-12 12:13 ` Duy Nguyen
2018-05-12 8:00 ` [PATCH 02/12] describe: use commit-slab for commit names " Nguyễn Thái Ngọc Duy
2018-05-12 8:00 ` [PATCH 03/12] shallow.c: use commit-slab for commit depth " Nguyễn Thái Ngọc Duy
2018-05-12 9:07 ` Jeff King
2018-05-12 9:18 ` Jeff King
2018-05-12 12:09 ` Duy Nguyen
2018-05-12 19:12 ` Jeff King
2018-05-12 11:59 ` Duy Nguyen
2018-05-12 8:00 ` [PATCH 04/12] sequencer.c: use commit-slab to mark seen commits Nguyễn Thái Ngọc Duy
2018-05-12 9:25 ` Jeff King
2018-05-12 13:43 ` Junio C Hamano
2018-05-12 14:00 ` Duy Nguyen
2018-05-12 8:00 ` [PATCH 05/12] sequencer.c: use commit-slab to associate todo items to commits Nguyễn Thái Ngọc Duy
2018-05-12 9:28 ` Jeff King
2018-05-12 8:00 ` [PATCH 06/12] revision.c: use commit-slab for show_source Nguyễn Thái Ngọc Duy
2018-05-12 9:33 ` Jeff King
2018-05-12 13:58 ` Junio C Hamano
2018-05-12 14:13 ` Duy Nguyen
2018-05-12 19:06 ` Jeff King
2018-05-12 8:00 ` [PATCH 07/12] bisect.c: use commit-slab for commit weight instead of commit->util Nguyễn Thái Ngọc Duy
2018-05-12 13:59 ` Junio C Hamano
2018-05-12 8:00 ` [PATCH 08/12] name-rev: use commit-slab for rev-name " Nguyễn Thái Ngọc Duy
2018-05-12 8:00 ` [PATCH 09/12] show-branch: use commit-slab for commit-name " Nguyễn Thái Ngọc Duy
2018-05-12 8:00 ` [PATCH 10/12] log: use commit-slab in prepare_bases() " Nguyễn Thái Ngọc Duy
2018-05-12 8:00 ` [PATCH 11/12] merge: use commit-slab in merge remote desc " Nguyễn Thái Ngọc Duy
2018-05-12 8:00 ` [PATCH 12/12] commit.h: delete 'util' field in struct commit Nguyễn Thái Ngọc Duy
2018-05-12 9:41 ` [PATCH 00/12] Die commit->util, die! Jeff King
2018-05-12 18:50 ` Jakub Narebski
2018-05-13 5:39 ` Duy Nguyen
2018-05-13 5:51 ` [PATCH v2 00/14] " Nguyễn Thái Ngọc Duy
2018-05-13 5:51 ` [PATCH v2 01/14] commit-slab.h: code split Nguyễn Thái Ngọc Duy
2018-05-13 23:33 ` Junio C Hamano
2018-05-13 5:51 ` [PATCH v2 02/14] commit-slab: support shared commit-slab Nguyễn Thái Ngọc Duy
2018-05-13 23:36 ` Junio C Hamano
2018-05-13 5:51 ` [PATCH v2 03/14] blame: use commit-slab for blame suspects instead of commit->util Nguyễn Thái Ngọc Duy
2018-05-13 23:42 ` Junio C Hamano
2018-05-13 5:51 ` [PATCH v2 04/14] describe: use commit-slab for commit names " Nguyễn Thái Ngọc Duy
2018-05-13 23:45 ` Junio C Hamano
2018-05-13 5:51 ` [PATCH v2 05/14] shallow.c: use commit-slab for commit depth " Nguyễn Thái Ngọc Duy
2018-05-13 5:52 ` [PATCH v2 06/14] sequencer.c: use commit-slab to mark seen commits Nguyễn Thái Ngọc Duy
2018-05-14 4:17 ` Junio C Hamano
2018-05-13 5:52 ` [PATCH v2 07/14] sequencer.c: use commit-slab to associate todo items to commits Nguyễn Thái Ngọc Duy
2018-05-13 5:52 ` [PATCH v2 08/14] revision.c: use commit-slab for show_source Nguyễn Thái Ngọc Duy
2018-05-14 5:10 ` Junio C Hamano
2018-05-14 5:37 ` Junio C Hamano
2018-05-13 5:52 ` [PATCH v2 09/14] bisect.c: use commit-slab for commit weight instead of commit->util Nguyễn Thái Ngọc Duy
2018-05-14 6:16 ` Junio C Hamano
2018-05-13 5:52 ` [PATCH v2 10/14] name-rev: use commit-slab for rev-name " Nguyễn Thái Ngọc Duy
2018-05-13 5:52 ` [PATCH v2 11/14] show-branch: use commit-slab for commit-name " Nguyễn Thái Ngọc Duy
2018-05-14 6:45 ` Junio C Hamano
2018-05-19 4:51 ` Duy Nguyen
2018-05-13 5:52 ` [PATCH v2 12/14] log: use commit-slab in prepare_bases() " Nguyễn Thái Ngọc Duy
2018-05-13 5:52 ` [PATCH v2 13/14] merge: use commit-slab in merge remote desc " Nguyễn Thái Ngọc Duy
2018-05-18 2:16 ` Junio C Hamano
2018-05-18 17:54 ` Ramsay Jones
2018-05-13 5:52 ` [PATCH v2 14/14] commit.h: delete 'util' field in struct commit Nguyễn Thái Ngọc Duy
2018-05-14 7:52 ` Junio C Hamano
2018-05-14 16:07 ` Duy Nguyen
2018-05-14 17:30 ` Duy Nguyen
2018-05-14 18:14 ` Derrick Stolee
2018-05-19 5:41 ` Duy Nguyen
2018-05-19 5:28 ` [PATCH v3 00/15] Die commit->util, die! Nguyễn Thái Ngọc Duy
2018-05-19 5:28 ` [PATCH v3 01/15] commit-slab.h: code split Nguyễn Thái Ngọc Duy
2018-05-21 5:11 ` Junio C Hamano
2018-05-19 5:28 ` [PATCH v3 02/15] commit-slab: support shared commit-slab Nguyễn Thái Ngọc Duy
2018-05-19 5:28 ` [PATCH v3 03/15] blame: use commit-slab for blame suspects instead of commit->util Nguyễn Thái Ngọc Duy
2018-05-19 5:28 ` [PATCH v3 04/15] describe: use commit-slab for commit names " Nguyễn Thái Ngọc Duy
2018-05-19 5:28 ` [PATCH v3 05/15] shallow.c: use commit-slab for commit depth " Nguyễn Thái Ngọc Duy
2018-05-19 5:28 ` [PATCH v3 06/15] sequencer.c: use commit-slab to mark seen commits Nguyễn Thái Ngọc Duy
2018-05-19 5:28 ` [PATCH v3 07/15] sequencer.c: use commit-slab to associate todo items to commits Nguyễn Thái Ngọc Duy
2018-05-19 5:28 ` [PATCH v3 08/15] revision.c: use commit-slab for show_source Nguyễn Thái Ngọc Duy
2018-05-19 5:28 ` [PATCH v3 09/15] bisect.c: use commit-slab for commit weight instead of commit->util Nguyễn Thái Ngọc Duy
2018-05-19 5:28 ` [PATCH v3 10/15] name-rev: use commit-slab for rev-name " Nguyễn Thái Ngọc Duy
2018-05-19 5:28 ` [PATCH v3 11/15] show-branch: use commit-slab for commit-name " Nguyễn Thái Ngọc Duy
2018-05-19 5:28 ` [PATCH v3 12/15] show-branch: note about its object flags usage Nguyễn Thái Ngọc Duy
2018-05-19 5:28 ` [PATCH v3 13/15] log: use commit-slab in prepare_bases() instead of commit->util Nguyễn Thái Ngọc Duy
2018-05-19 5:28 ` [PATCH v3 14/15] merge: use commit-slab in merge remote desc " Nguyễn Thái Ngọc Duy
2018-05-19 5:28 ` Nguyễn Thái Ngọc Duy [this message]
2018-05-22 22:40 ` [PATCH 00/12] Die commit->util, die! Stefan Beller
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