MediaWiki 1.30.2

[autoinstallsdev/mediawiki.git] / maintenance / benchmarks / bench_delete_truncate.php

diff --git a/maintenance/benchmarks/bench_delete_truncate.php b/maintenance/benchmarks/bench_delete_truncate.php
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+<?php
+/**
+ * Benchmark SQL DELETE vs SQL TRUNCATE.
+ *
+ * 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
+ */
+
+require_once __DIR__ . '/Benchmarker.php';
+
+use Wikimedia\Rdbms\IDatabase;
+use Wikimedia\Rdbms\IMaintainableDatabase;
+
+/**
+ * Maintenance script that benchmarks SQL DELETE vs SQL TRUNCATE.
+ *
+ * @ingroup Benchmark
+ */
+class BenchmarkDeleteTruncate extends Benchmarker {
+       protected $defaultCount = 10;
+
+       public function __construct() {
+               parent::__construct();
+               $this->addDescription( 'Benchmarks SQL DELETE vs SQL TRUNCATE.' );
+       }
+
+       public function execute() {
+               $dbw = $this->getDB( DB_MASTER );
+
+               $test = $dbw->tableName( 'test' );
+               $dbw->query( "CREATE TABLE IF NOT EXISTS /*_*/$test (
+  test_id int unsigned NOT NULL PRIMARY KEY AUTO_INCREMENT,
+  text varbinary(255) NOT NULL
+);" );
+
+               $this->bench( [
+                       'Delete' => [
+                               'setup' => function () use ( $dbw ) {
+                                       $this->insertData( $dbw );
+                               },
+                               'function' => function () use ( $dbw ) {
+                                       $this->delete( $dbw );
+                               }
+                       ],
+                       'Truncate' => [
+                               'setup' => function () use ( $dbw ) {
+                                       $this->insertData( $dbw );
+                               },
+                               'function' => function () use ( $dbw ) {
+                                       $this->truncate( $dbw );
+                               }
+                       ]
+               ] );
+
+               $dbw->dropTable( 'test' );
+       }
+
+       /**
+        * @param IDatabase $dbw
+        * @return void
+        */
+       private function insertData( $dbw ) {
+               $range = range( 0, 1024 );
+               $data = [];
+               foreach ( $range as $r ) {
+                       $data[] = [ 'text' => $r ];
+               }
+               $dbw->insert( 'test', $data, __METHOD__ );
+       }
+
+       /**
+        * @param IDatabase $dbw
+        * @return void
+        */
+       private function delete( $dbw ) {
+               $dbw->delete( 'text', '*', __METHOD__ );
+       }
+
+       /**
+        * @param IMaintainableDatabase $dbw
+        * @return void
+        */
+       private function truncate( $dbw ) {
+               $test = $dbw->tableName( 'test' );
+               $dbw->query( "TRUNCATE TABLE $test" );
+       }
+}
+
+$maintClass = 'BenchmarkDeleteTruncate';
+require_once RUN_MAINTENANCE_IF_MAIN;