From: Elijah Newren <newren@gmail.com> To: git@vger.kernel.org Cc: Elijah Newren <newren@gmail.com> Subject: [PATCH v2 07/20] merge-ort: avoid repeating fill_tree_descriptor() on the same tree Date: Mon, 2 Nov 2020 12:43:31 -0800 [thread overview] Message-ID: <20201102204344.342633-8-newren@gmail.com> (raw) In-Reply-To: <20201102204344.342633-1-newren@gmail.com> Three-way merges, by their nature, are going to often have two or more trees match at a given subdirectory. We can avoid calling fill_tree_descriptor() on the same tree by checking when these trees match. Noting when various oids match will also be useful in other calculations and optimizations as well. Signed-off-by: Elijah Newren <newren@gmail.com> --- merge-ort.c | 26 ++++++++++++++++++++++---- 1 file changed, 22 insertions(+), 4 deletions(-) diff --git a/merge-ort.c b/merge-ort.c index 626eb9713e..d3c1d00fc6 100644 --- a/merge-ort.c +++ b/merge-ort.c @@ -99,6 +99,15 @@ static int collect_merge_info_callback(int n, unsigned mbase_null = !(mask & 1); unsigned side1_null = !(mask & 2); unsigned side2_null = !(mask & 4); + unsigned side1_matches_mbase = (!side1_null && !mbase_null && + names[0].mode == names[1].mode && + oideq(&names[0].oid, &names[1].oid)); + unsigned side2_matches_mbase = (!side2_null && !mbase_null && + names[0].mode == names[2].mode && + oideq(&names[0].oid, &names[2].oid)); + unsigned sides_match = (!side1_null && !side2_null && + names[1].mode == names[2].mode && + oideq(&names[1].oid, &names[2].oid)); /* n = 3 is a fundamental assumption. */ if (n != 3) @@ -154,10 +163,19 @@ static int collect_merge_info_callback(int n, newinfo.pathlen = st_add3(newinfo.pathlen, p->pathlen, 1); for (i = 0; i < 3; i++, dirmask >>= 1) { - const struct object_id *oid = NULL; - if (dirmask & 1) - oid = &names[i].oid; - buf[i] = fill_tree_descriptor(opt->repo, t + i, oid); + if (i == 1 && side1_matches_mbase) + t[1] = t[0]; + else if (i == 2 && side2_matches_mbase) + t[2] = t[0]; + else if (i == 2 && sides_match) + t[2] = t[1]; + else { + const struct object_id *oid = NULL; + if (dirmask & 1) + oid = &names[i].oid; + buf[i] = fill_tree_descriptor(opt->repo, + t + i, oid); + } } original_dir_name = opti->current_dir_name; -- 2.29.0.471.ga4f56089c0
next prev parent reply other threads:[~2020-11-02 20:44 UTC|newest] Thread overview: 84+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-11-02 20:43 [PATCH v2 00/20] fundamentals of merge-ort implementation Elijah Newren 2020-11-02 20:43 ` [PATCH v2 01/20] merge-ort: setup basic internal data structures Elijah Newren 2020-11-06 22:05 ` Jonathan Tan 2020-11-06 22:45 ` Elijah Newren 2020-11-09 20:55 ` Jonathan Tan 2020-11-02 20:43 ` [PATCH v2 02/20] merge-ort: add some high-level algorithm structure Elijah Newren 2020-11-02 20:43 ` [PATCH v2 03/20] merge-ort: port merge_start() from merge-recursive Elijah Newren 2020-11-11 13:52 ` Derrick Stolee 2020-11-11 16:22 ` Elijah Newren 2020-11-02 20:43 ` [PATCH v2 04/20] merge-ort: use histogram diff Elijah Newren 2020-11-11 13:54 ` Derrick Stolee 2020-11-11 16:47 ` Elijah Newren 2020-11-11 16:51 ` Derrick Stolee 2020-11-11 17:03 ` Elijah Newren 2020-11-02 20:43 ` [PATCH v2 05/20] merge-ort: add an err() function similar to one from merge-recursive Elijah Newren 2020-11-11 13:58 ` Derrick Stolee 2020-11-11 17:07 ` Elijah Newren 2020-11-11 17:10 ` Derrick Stolee 2020-11-02 20:43 ` [PATCH v2 06/20] merge-ort: implement a very basic collect_merge_info() Elijah Newren 2020-11-06 22:19 ` Jonathan Tan 2020-11-06 23:10 ` Elijah Newren 2020-11-09 20:59 ` Jonathan Tan 2020-11-11 14:38 ` Derrick Stolee 2020-11-11 17:02 ` Elijah Newren 2020-11-02 20:43 ` Elijah Newren [this message] 2020-11-11 14:51 ` [PATCH v2 07/20] merge-ort: avoid repeating fill_tree_descriptor() on the same tree Derrick Stolee 2020-11-11 17:13 ` Elijah Newren 2020-11-11 17:21 ` Eric Sunshine 2020-11-02 20:43 ` [PATCH v2 08/20] merge-ort: compute a few more useful fields for collect_merge_info Elijah Newren 2020-11-06 22:52 ` Jonathan Tan 2020-11-06 23:41 ` Elijah Newren 2020-11-09 22:04 ` Jonathan Tan 2020-11-09 23:05 ` Elijah Newren 2020-11-02 20:43 ` [PATCH v2 09/20] merge-ort: record stage and auxiliary info for every path Elijah Newren 2020-11-06 22:58 ` Jonathan Tan 2020-11-07 0:26 ` Elijah Newren 2020-11-09 22:09 ` Jonathan Tan 2020-11-09 23:08 ` Elijah Newren 2020-11-11 15:26 ` Derrick Stolee 2020-11-11 18:16 ` Elijah Newren 2020-11-11 22:06 ` Elijah Newren 2020-11-12 18:23 ` Derrick Stolee 2020-11-12 18:39 ` Derrick Stolee 2020-11-02 20:43 ` [PATCH v2 10/20] merge-ort: avoid recursing into identical trees Elijah Newren 2020-11-11 15:31 ` Derrick Stolee 2020-11-02 20:43 ` [PATCH v2 11/20] merge-ort: add a preliminary simple process_entries() implementation Elijah Newren 2020-11-11 19:51 ` Jonathan Tan 2020-11-12 1:48 ` Elijah Newren 2020-11-02 20:43 ` [PATCH v2 12/20] merge-ort: have process_entries operate in a defined order Elijah Newren 2020-11-11 16:09 ` Derrick Stolee 2020-11-11 18:58 ` Elijah Newren 2020-11-02 20:43 ` [PATCH v2 13/20] merge-ort: step 1 of tree writing -- record basenames, modes, and oids Elijah Newren 2020-11-11 20:01 ` Jonathan Tan 2020-11-11 20:24 ` Elijah Newren 2020-11-12 20:39 ` Jonathan Tan 2020-11-02 20:43 ` [PATCH v2 14/20] merge-ort: step 2 of tree writing -- function to create tree object Elijah Newren 2020-11-11 20:47 ` Jonathan Tan 2020-11-11 21:21 ` Elijah Newren 2020-11-02 20:43 ` [PATCH v2 15/20] merge-ort: step 3 of tree writing -- handling subdirectories as we go Elijah Newren 2020-11-12 20:15 ` Jonathan Tan 2020-11-12 22:30 ` Elijah Newren 2020-11-24 20:19 ` Elijah Newren 2020-11-25 2:07 ` Jonathan Tan 2020-11-26 18:13 ` Elijah Newren 2020-11-30 18:41 ` Jonathan Tan 2020-11-02 20:43 ` [PATCH v2 16/20] merge-ort: basic outline for merge_switch_to_result() Elijah Newren 2020-11-02 20:43 ` [PATCH v2 17/20] merge-ort: add implementation of checkout() Elijah Newren 2020-11-02 20:43 ` [PATCH v2 18/20] tree: enable cmp_cache_name_compare() to be used elsewhere Elijah Newren 2020-11-02 20:43 ` [PATCH v2 19/20] merge-ort: add implementation of record_unmerged_index_entries() Elijah Newren 2020-11-02 20:43 ` [PATCH v2 20/20] merge-ort: free data structures in merge_finalize() Elijah Newren 2020-11-03 14:49 ` [PATCH v2 00/20] fundamentals of merge-ort implementation Derrick Stolee 2020-11-03 16:36 ` Elijah Newren 2020-11-07 6:06 ` Elijah Newren 2020-11-07 15:02 ` Derrick Stolee 2020-11-07 19:39 ` Elijah Newren 2020-11-09 12:30 ` Derrick Stolee 2020-11-09 17:13 ` Elijah Newren 2020-11-09 19:51 ` Derrick Stolee 2020-11-09 22:44 ` Elijah Newren 2020-11-11 17:08 ` Derrick Stolee 2020-11-11 18:35 ` Elijah Newren 2020-11-11 20:48 ` Derrick Stolee 2020-11-11 21:18 ` Elijah Newren 2020-11-29 7:43 [PATCH " Elijah Newren via GitGitGadget 2020-12-04 20:47 ` [PATCH v2 " Elijah Newren via GitGitGadget 2020-12-04 20:47 ` [PATCH v2 07/20] merge-ort: avoid repeating fill_tree_descriptor() on the same tree Elijah Newren 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=20201102204344.342633-8-newren@gmail.com \ --to=newren@gmail.com \ --cc=git@vger.kernel.org \ --subject='Re: [PATCH v2 07/20] merge-ort: avoid repeating fill_tree_descriptor() on the same tree' \ /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
Code repositories for project(s) associated with this 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).