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From: "Derrick Stolee via GitGitGadget" <gitgitgadget@gmail.com>
To: git@vger.kernel.org
Cc: Johannes.Schindelin@gmx.de, peff@peff.net, jnareb@gmail.com,
	pclouds@gmail.com, carenas@gmail.com, avarab@gmail.com,
	Junio C Hamano <gitster@pobox.com>,
	Derrick Stolee <dstolee@microsoft.com>
Subject: [PATCH v2 4/5] repo-settings: create feature.manyFiles setting
Date: Wed, 24 Jul 2019 19:23:17 -0700 (PDT)	[thread overview]
Message-ID: <86a5a0c5895b4cd99a3d42469abe8142be7ac380.1564021393.git.gitgitgadget@gmail.com> (raw)
In-Reply-To: <pull.292.v2.git.gitgitgadget@gmail.com>

From: Derrick Stolee <dstolee@microsoft.com>

The feature.manyFiles setting is suitable for repos with many
files in the working directory. By setting index.version=4 and
core.untrackedCache=true, commands such as 'git status' should
improve.

While adding this setting, modify the index version precedence
tests to check how this setting overrides the default for
index.version is unset.

Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
---
 Documentation/config/core.txt    |  4 +++-
 Documentation/config/feature.txt | 12 +++++++++++-
 Documentation/config/index.txt   |  1 +
 repo-settings.c                  |  4 ++++
 t/t1600-index.sh                 | 31 ++++++++++++++++++++++++++-----
 5 files changed, 45 insertions(+), 7 deletions(-)

diff --git a/Documentation/config/core.txt b/Documentation/config/core.txt
index d80162681a..7a2a33bc8c 100644
--- a/Documentation/config/core.txt
+++ b/Documentation/config/core.txt
@@ -86,7 +86,9 @@ core.untrackedCache::
 	it will automatically be removed, if set to `false`. Before
 	setting it to `true`, you should check that mtime is working
 	properly on your system.
-	See linkgit:git-update-index[1]. `keep` by default.
+	See linkgit:git-update-index[1]. `keep` by default, unless
+	`feature.manyFiles` is enabled which sets this setting to
+	`true` by default.
 
 core.checkStat::
 	When missing or is set to `default`, many fields in the stat
diff --git a/Documentation/config/feature.txt b/Documentation/config/feature.txt
index f74314ae90..c2d9ef7473 100644
--- a/Documentation/config/feature.txt
+++ b/Documentation/config/feature.txt
@@ -12,4 +12,14 @@ feature.manyCommits::
 * `core.commitGraph=true` enables reading the commit-graph file.
 +
 * `gc.writeCommitGraph=true` enables writing the commit-graph file during
-garbage collection.
\ No newline at end of file
+garbage collection.
+
+feature.manyFiles::
+	Enable config options that optimize for repos with many files in the
+	working directory. With many files, commands such as `git status` and
+	`git checkout` may be slow and these new defaults improve performance:
++
+* `index.version=4` enables path-prefix compression in the index.
++
+* `core.untrackedCache=true` enables the untracked cache. This setting assumes
+that mtime is working on your machine.
\ No newline at end of file
diff --git a/Documentation/config/index.txt b/Documentation/config/index.txt
index f181503041..7cb50b37e9 100644
--- a/Documentation/config/index.txt
+++ b/Documentation/config/index.txt
@@ -24,3 +24,4 @@ index.threads::
 index.version::
 	Specify the version with which new index files should be
 	initialized.  This does not affect existing repositories.
+	If `feature.manyFiles` is enabled, then the default is 4.
diff --git a/repo-settings.c b/repo-settings.c
index 65b980403c..3a5cf33814 100644
--- a/repo-settings.c
+++ b/repo-settings.c
@@ -43,6 +43,10 @@ void prepare_repo_settings(struct repository *r)
 		UPDATE_DEFAULT(r->settings.core_commit_graph, 1);
 		UPDATE_DEFAULT(r->settings.gc_write_commit_graph, 1);
 	}
+	if (!repo_config_get_bool(r, "feature.manyfiles", &value) && value) {
+		UPDATE_DEFAULT(r->settings.index_version, 4);
+		UPDATE_DEFAULT(r->settings.core_untracked_cache, UNTRACKED_CACHE_WRITE);
+	}
 
 	/* Hack for test programs like test-dump-untracked-cache */
 	if (ignore_untracked_cache_config)
diff --git a/t/t1600-index.sh b/t/t1600-index.sh
index 42962ed7d4..c77721b580 100755
--- a/t/t1600-index.sh
+++ b/t/t1600-index.sh
@@ -59,17 +59,38 @@ test_expect_success 'out of bounds index.version issues warning' '
 	)
 '
 
-test_expect_success 'GIT_INDEX_VERSION takes precedence over config' '
+test_index_version () {
+	INDEX_VERSION_CONFIG=$1 &&
+	FEATURE_MANY_FILES=$2 &&
+	ENV_VAR_VERSION=$3
+	EXPECTED_OUTPUT_VERSION=$4 &&
 	(
 		rm -f .git/index &&
-		GIT_INDEX_VERSION=4 &&
-		export GIT_INDEX_VERSION &&
-		git config --add index.version 2 &&
+		rm -f .git/config &&
+		if test "$INDEX_VERSION_CONFIG" -ne 0
+		then
+			git config --add index.version $INDEX_VERSION_CONFIG
+		fi &&
+		git config --add feature.manyFiles $FEATURE_MANY_FILES
+		if test "$ENV_VAR_VERSION" -ne 0
+		then
+			GIT_INDEX_VERSION=$ENV_VAR_VERSION &&
+			export GIT_INDEX_VERSION
+		else
+			unset GIT_INDEX_VERSION
+		fi &&
 		git add a 2>&1 &&
-		echo 4 >expect &&
+		echo $EXPECTED_OUTPUT_VERSION >expect &&
 		test-tool index-version <.git/index >actual &&
 		test_cmp expect actual
 	)
+}
+
+test_expect_success 'index version config precedence' '
+	test_index_version 2 false 4 4 &&
+	test_index_version 2 true 0 2 &&
+	test_index_version 0 true 0 4 &&
+	test_index_version 0 true 2 2
 '
 
 test_done
-- 
gitgitgadget


  parent reply	other threads:[~2019-07-25  2:23 UTC|newest]

Thread overview: 61+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-07-22 17:54 [PATCH 0/5] Create 'feature.*' config area and some centralized config parsing Derrick Stolee via GitGitGadget
2019-07-22 17:54 ` [PATCH 1/5] repo-settings: consolidate some config settings Derrick Stolee via GitGitGadget
2019-07-23 13:12   ` Johannes Schindelin
2019-07-22 17:54 ` [PATCH 2/5] repo-settings: add feature.manyCommits setting Derrick Stolee via GitGitGadget
2019-07-23 14:53   ` Johannes Schindelin
2019-07-24 10:41     ` Derrick Stolee
2019-07-22 17:54 ` [PATCH 4/5] repo-settings: create feature.manyFiles setting Derrick Stolee via GitGitGadget
2019-07-22 17:54 ` [PATCH 3/5] repo-settings: parse core.untrackedCache Derrick Stolee via GitGitGadget
2019-07-23 15:04   ` Johannes Schindelin
2019-07-24 19:27     ` Derrick Stolee
2019-07-22 17:54 ` [PATCH 5/5] repo-settings: create feature.experimental setting Derrick Stolee via GitGitGadget
2019-07-23 15:20   ` Johannes Schindelin
2019-07-25  1:47     ` Derrick Stolee
2019-07-25  2:23 ` [PATCH v2 0/5] Create 'feature.*' config area and some centralized config parsing Derrick Stolee via GitGitGadget
2019-07-25  2:23   ` [PATCH v2 2/5] repo-settings: add feature.manyCommits setting Derrick Stolee via GitGitGadget
2019-07-25  2:23   ` [PATCH v2 1/5] repo-settings: consolidate some config settings Derrick Stolee via GitGitGadget
2019-07-25  9:30     ` Johannes Schindelin
2019-07-25  2:23   ` [PATCH v2 3/5] repo-settings: parse core.untrackedCache Derrick Stolee via GitGitGadget
2019-07-25  9:36     ` Johannes Schindelin
2019-07-25  2:23   ` Derrick Stolee via GitGitGadget [this message]
2019-07-25  2:23   ` [PATCH v2 5/5] repo-settings: create feature.experimental setting Derrick Stolee via GitGitGadget
2019-07-25  9:40   ` [PATCH v2 0/5] Create 'feature.*' config area and some centralized config parsing Johannes Schindelin
2019-07-30 19:35   ` [PATCH v3 " Derrick Stolee via GitGitGadget
2019-07-30 19:35     ` [PATCH v3 1/5] repo-settings: consolidate some config settings Derrick Stolee via GitGitGadget
2019-07-30 20:47       ` Junio C Hamano
2019-07-30 19:35     ` [PATCH v3 2/5] repo-settings: add feature.manyCommits setting Derrick Stolee via GitGitGadget
2019-07-30 20:57       ` Junio C Hamano
2019-07-31 13:17         ` Johannes Schindelin
2019-07-31 15:48           ` Junio C Hamano
2019-07-31 15:01       ` Ævar Arnfjörð Bjarmason
2019-08-01 18:27         ` Derrick Stolee
2019-07-30 19:35     ` [PATCH v3 4/5] repo-settings: create feature.manyFiles setting Derrick Stolee via GitGitGadget
2019-07-30 19:35     ` [PATCH v3 3/5] repo-settings: parse core.untrackedCache Derrick Stolee via GitGitGadget
2019-07-30 19:35     ` [PATCH v3 5/5] repo-settings: create feature.experimental setting Derrick Stolee via GitGitGadget
2019-08-08 18:34       ` Elijah Newren
2019-08-08 18:48         ` Derrick Stolee
2019-08-08 18:59         ` Junio C Hamano
2019-08-08 19:12           ` Derrick Stolee
2019-08-08 20:31             ` Elijah Newren
2019-08-08 20:49               ` Derrick Stolee
2019-08-08 19:19           ` Elijah Newren
2019-08-08 20:07             ` Junio C Hamano
2019-08-08 20:46               ` Derrick Stolee
2019-08-13 18:37     ` [PATCH v4 0/6] Create 'feature.*' config area and some centralized config parsing Derrick Stolee via GitGitGadget
2019-08-13 18:37       ` [PATCH v4 1/6] repo-settings: consolidate some config settings Derrick Stolee via GitGitGadget
2019-08-13 18:37       ` [PATCH v4 3/6] commit-graph: turn on commit-graph by default Derrick Stolee via GitGitGadget
2021-09-20  0:42         ` Junio C Hamano
2021-09-20  1:22           ` Ævar Arnfjörð Bjarmason
2021-09-20  1:25           ` brian m. carlson
2021-09-20 12:53             ` Phillip Wood
2021-09-20 13:30               ` Ævar Arnfjörð Bjarmason
2021-09-20 18:00                 ` Phillip Wood
2021-09-20 19:18                 ` Jeff King
2019-08-13 18:37       ` [PATCH v4 2/6] t6501: use 'git gc' in quiet mode Derrick Stolee via GitGitGadget
2019-08-13 18:37       ` [PATCH v4 4/6] repo-settings: parse core.untrackedCache Derrick Stolee via GitGitGadget
2019-08-13 18:37       ` [PATCH v4 5/6] repo-settings: create feature.manyFiles setting Derrick Stolee via GitGitGadget
2019-08-13 18:37       ` [PATCH v4 6/6] repo-settings: create feature.experimental setting Derrick Stolee via GitGitGadget
2019-08-13 21:04       ` [PATCH v4 0/6] Create 'feature.*' config area and some centralized config parsing Junio C Hamano
2019-08-13 21:08         ` Junio C Hamano
2019-08-14 10:32           ` Derrick Stolee
2019-08-14 10:38             ` Derrick Stolee

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