3 require_once( dirname( __FILE__
) . '/Benchmarker.php' );
5 class BenchmarkDeleteTruncate
extends Benchmarker
{
7 public function __construct() {
9 $this->mDescription
= "Benchmarks SQL DELETE vs SQL TRUNCATE.";
12 public function execute() {
13 $dbw = wfGetDB( DB_MASTER
);
15 $test = $dbw->tableName( 'test' );
16 $dbw->query( "CREATE TABLE IF NOT EXISTS /*_*/$test (
17 test_id int unsigned NOT NULL PRIMARY KEY AUTO_INCREMENT,
18 text varbinary(255) NOT NULL
21 $this->insertData( $dbw );
25 $this->delete( $dbw );
29 echo "Delete: " . $end - $start;
32 $this->insertData( $dbw );
36 $this->truncate( $dbw );
40 echo "Truncate: " . $end - $start;
43 $dbw->dropTable( 'test' );
47 * @param $dbw DatabaseBase
50 private function insertData( $dbw ) {
51 $range = range( 0, 1024 );
53 foreach( $range as $r ) {
54 $data[] = array( 'text' => $r );
56 $dbw->insert( 'test', $data, __METHOD__
);
60 * @param $dbw DatabaseBase
63 private function delete( $dbw ) {
64 $dbw->delete( 'text', '*', __METHOD__
);
68 * @param $dbw DatabaseBase
71 private function truncate( $dbw ) {
72 $test = $dbw->tableName( 'test' );
73 $dbw->query( "TRUNCATE TABLE $test" );
77 $maintClass = "BenchmarkDeleteTruncate";
78 require_once( RUN_MAINTENANCE_IF_MAIN
);