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diff --git a/www/wiki/maintenance/benchmarks/benchmarkCSSMin.php b/www/wiki/maintenance/benchmarks/benchmarkCSSMin.php
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+++ b/www/wiki/maintenance/benchmarks/benchmarkCSSMin.php
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+<?php
+/**
+ * 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
+ * @author Timo Tijhof
+ */
+
+require_once __DIR__ . '/Benchmarker.php';
+
+/**
+ * Maintenance script that benchmarks CSSMin.
+ *
+ * @ingroup Benchmark
+ */
+class BenchmarkCSSMin extends Benchmarker {
+	public function __construct() {
+		parent::__construct();
+		$this->addDescription( 'Benchmarks CSSMin.' );
+		$this->addOption( 'file', 'Path to CSS file (may be gzipped)', false, true );
+		$this->addOption( 'out', 'Echo output of one run to stdout for inspection', false, false );
+	}
+
+	public function execute() {
+		$file = $this->getOption( 'file', __DIR__ . '/cssmin/styles.css' );
+		$filename = basename( $file );
+		$css = $this->loadFile( $file );
+
+		if ( $this->hasOption( 'out' ) ) {
+			echo "## minify\n\n",
+				CSSMin::minify( $css ),
+				"\n\n";
+			echo "## remap\n\n",
+				CSSMin::remap( $css, dirname( $file ), 'https://example.org/test/', true ),
+				"\n";
+			return;
+		}
+
+		$this->bench( [
+			"minify ($filename)" => [
+				'function' => [ CSSMin::class, 'minify' ],
+				'args' => [ $css ]
+			],
+			"remap ($filename)" => [
+				'function' => [ CSSMin::class, 'remap' ],
+				'args' => [ $css, dirname( $file ), 'https://example.org/test/', true ]
+			],
+		] );
+	}
+
+	private function loadFile( $file ) {
+		$css = file_get_contents( $file );
+		// Detect GZIP compression header
+		if ( substr( $css, 0, 2 ) === "\037\213" ) {
+			$css = gzdecode( $css );
+		}
+		return $css;
+	}
+}
+
+$maintClass = BenchmarkCSSMin::class;
+require_once RUN_MAINTENANCE_IF_MAIN;