3 files changed, 127 insertions, 0 deletions
diff --git a/autoload.php b/autoload.php
index 5f10674190c9..f180ebea4ca9 100644
--- a/autoload.php
+++ b/autoload.php
@@ -191,6 +191,7 @@ $wgAutoloadLocalClasses = [
 	'BenchmarkParse' => __DIR__ . '/maintenance/benchmarks/benchmarkParse.php',
 	'BenchmarkPurge' => __DIR__ . '/maintenance/benchmarks/benchmarkPurge.php',
 	'BenchmarkSanitizer' => __DIR__ . '/maintenance/benchmarks/benchmarkSanitizer.php',
+	'BenchmarkSettings' => __DIR__ . '/maintenance/benchmarks/benchmarkSettings.php',
 	'BenchmarkTidy' => __DIR__ . '/maintenance/benchmarks/benchmarkTidy.php',
 	'BenchmarkTitleValue' => __DIR__ . '/maintenance/benchmarks/benchmarkTitleValue.php',
 	'BenchmarkTruncate' => __DIR__ . '/maintenance/benchmarks/benchmarkTruncate.php',
diff --git a/includes/Settings/Config/NullIniSink.php b/includes/Settings/Config/NullIniSink.php
new file mode 100644
index 000000000000..998f4b674a57
--- /dev/null
+++ b/includes/Settings/Config/NullIniSink.php
@@ -0,0 +1,21 @@
+<?php
+
+namespace MediaWiki\Settings\Config;
+
+/**
+ * Null implementation of PhpIniSink, useful for testing and benchmarking.
+ *
+ * @unstable
+ */
+class NullIniSink extends PhpIniSink {
+
+	/**
+	 * @param string $option
+	 * @param string $value
+	 * @return void
+	 */
+	public function set( string $option, string $value ): void {
+		// noop
+	}
+
+}
diff --git a/maintenance/benchmarks/benchmarkSettings.php b/maintenance/benchmarks/benchmarkSettings.php
new file mode 100644
index 000000000000..24f7e5fb7199
--- /dev/null
+++ b/maintenance/benchmarks/benchmarkSettings.php
@@ -0,0 +1,105 @@
+<?php
+/**
+ * Benchmark %MediaWiki hooks.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @file
+ * @ingroup Benchmark
+ */
+
+use MediaWiki\MainConfigSchema;
+use MediaWiki\Settings\Config\ArrayConfigBuilder;
+use MediaWiki\Settings\Config\NullIniSink;
+use MediaWiki\Settings\SettingsBuilder;
+use MediaWiki\Settings\Source\PhpSettingsSource;
+use MediaWiki\Settings\Source\ReflectionSchemaSource;
+
+require_once __DIR__ . '/../includes/Benchmarker.php';
+
+/**
+ * Maintenance script that benchmarks loading of settings files.
+ *
+ * @ingroup Benchmark
+ */
+class BenchmarkSettings extends Benchmarker {
+	public function __construct() {
+		parent::__construct();
+		$this->defaultCount = 100;
+		$this->addDescription( 'Benchmark loading settings files.' );
+	}
+
+	private function newSettingsBuilder() {
+		$extReg = new ExtensionRegistry();
+		$configBuilder = new ArrayConfigBuilder();
+		$phpIniSink = new NullIniSink();
+		return new SettingsBuilder( MW_INSTALL_PATH, $extReg, $configBuilder, $phpIniSink, null );
+	}
+
+	public function execute() {
+		$benches = [];
+
+		$benches['DefaultSettings.php'] = [
+			'setup' => static function () {
+				// do this once beforehand
+				include MW_INSTALL_PATH . '/includes/DefaultSettings.php';
+			},
+			'function' => static function () {
+				include MW_INSTALL_PATH . '/includes/DefaultSettings.php';
+			}
+		];
+
+		$benches['DefaultSettings.php + config-merge-strategies.php'] = [
+			'setup' => static function () {
+				// do this once beforehand
+				include MW_INSTALL_PATH . '/includes/DefaultSettings.php';
+			},
+			'function' => function () {
+				include MW_INSTALL_PATH . '/includes/DefaultSettings.php';
+				$settingsBuilder = $this->newSettingsBuilder();
+				$settingsBuilder->load(
+					new PhpSettingsSource(
+						MW_INSTALL_PATH . '/includes/config-merge-strategies.php'
+					)
+				);
+				$settingsBuilder->apply();
+			}
+		];
+
+		$benches['config-schema.php'] = [
+			'function' => function () {
+				$settingsBuilder = $this->newSettingsBuilder();
+				$settingsBuilder->load(
+					new PhpSettingsSource( MW_INSTALL_PATH . '/includes/config-schema.php' )
+				);
+				$settingsBuilder->apply();
+			}
+		];
+
+		$benches['MainConfigSchema::class'] = [
+			'function' => function () {
+				$settingsBuilder = $this->newSettingsBuilder();
+				$settingsBuilder->load( new ReflectionSchemaSource( MainConfigSchema::class ) );
+				$settingsBuilder->apply();
+			}
+		];
+
+		$this->bench( $benches );
+	}
+}
+
+$maintClass = BenchmarkSettings::class;
+require_once RUN_MAINTENANCE_IF_MAIN;