maintenance/benchmarks/bench_delete_truncate.php

   1 <?php
   2 /**
   3  * Benchmark SQL DELETE vs SQL TRUNCATE.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  * @ingroup Benchmark
  22  */
  23
  24 require_once __DIR__ . '/Benchmarker.php';
  25
  26 use Wikimedia\Rdbms\IDatabase;
  27 use Wikimedia\Rdbms\IMaintainableDatabase;
  28
  29 /**
  30  * Maintenance script that benchmarks SQL DELETE vs SQL TRUNCATE.
  31  *
  32  * @ingroup Benchmark
  33  */
  34 class BenchmarkDeleteTruncate extends Benchmarker {
  35         protected $defaultCount = 10;
  36
  37         public function __construct() {
  38                 parent::__construct();
  39                 $this->addDescription( 'Benchmarks SQL DELETE vs SQL TRUNCATE.' );
  40         }
  41
  42         public function execute() {
  43                 $dbw = $this->getDB( DB_MASTER );
  44
  45                 $test = $dbw->tableName( 'test' );
  46                 $dbw->query( "CREATE TABLE IF NOT EXISTS /*_*/$test (
  47   test_id int unsigned NOT NULL PRIMARY KEY AUTO_INCREMENT,
  48   text varbinary(255) NOT NULL
  49 );" );
  50
  51                 $this->bench( [
  52                         'Delete' => [
  53                                 'setup' => function () use ( $dbw ) {
  54                                         $this->insertData( $dbw );
  55                                 },
  56                                 'function' => function () use ( $dbw ) {
  57                                         $this->delete( $dbw );
  58                                 }
  59                         ],
  60                         'Truncate' => [
  61                                 'setup' => function () use ( $dbw ) {
  62                                         $this->insertData( $dbw );
  63                                 },
  64                                 'function' => function () use ( $dbw ) {
  65                                         $this->truncate( $dbw );
  66                                 }
  67                         ]
  68                 ] );
  69
  70                 $dbw->dropTable( 'test' );
  71         }
  72
  73         /**
  74          * @param IDatabase $dbw
  75          * @return void
  76          */
  77         private function insertData( $dbw ) {
  78                 $range = range( 0, 1024 );
  79                 $data = [];
  80                 foreach ( $range as $r ) {
  81                         $data[] = [ 'text' => $r ];
  82                 }
  83                 $dbw->insert( 'test', $data, __METHOD__ );
  84         }
  85
  86         /**
  87          * @param IDatabase $dbw
  88          * @return void
  89          */
  90         private function delete( $dbw ) {
  91                 $dbw->delete( 'text', '*', __METHOD__ );
  92         }
  93
  94         /**
  95          * @param IMaintainableDatabase $dbw
  96          * @return void
  97          */
  98         private function truncate( $dbw ) {
  99                 $test = $dbw->tableName( 'test' );
 100                 $dbw->query( "TRUNCATE TABLE $test" );
 101         }
 102 }
 103
 104 $maintClass = BenchmarkDeleteTruncate::class;
 105 require_once RUN_MAINTENANCE_IF_MAIN;