--- /dev/null
+<?php
+
+require_once( dirname( __FILE__ ) . '/Benchmarker.php' );
+
+class BenchmarkPurge extends Benchmarker {
+
+ public function __construct() {
+ parent::__construct();
+ $this->mDescription = "Benchmarks SQL DELETE vs SQL TRUNCATE.";
+ }
+
+ public function execute() {
+ $dbw = wfGetDB( DB_MASTER );
+
+ $test = $dbw->tableName( 'test' );
+ $dbw->doQuery( "CREATE TABLE IF NOT EXISTS /*_*/$test (
+ test_id int unsigned NOT NULL PRIMARY KEY AUTO_INCREMENT,
+ text varbinary(255) NOT NULL
+);" );
+
+ $this->insertData( $dbw );
+
+ $start = wfTime();
+
+ $this->delete( $dbw );
+
+ $end = wfTime();
+
+ echo "Delete: " . $end - $start;
+ echo "\r\n";
+
+ $this->insertData( $dbw );
+
+ $start = wfTime();
+
+ $this->truncate( $dbw );
+
+ $end = wfTime();
+
+ echo "Truncate: " . $end - $start;
+ echo "\r\n";
+
+ $dbw->dropTable( 'test' );
+ }
+
+ /**
+ * @param $dbw DatabaseBase
+ * @return void
+ */
+ private function insertData( $dbw ) {
+ $range = range( 0, 1024 );
+ $data = array();
+ foreach( $range as $r ) {
+ $data[] = array( 'text' => $r );
+ }
+ $dbw->insert( 'test', $data, __METHOD__ );
+ }
+
+ /**
+ * @param $dbw DatabaseBase
+ * @return void
+ */
+ private function delete( $dbw ) {
+ $dbw->delete( 'text', '*', __METHOD__ );
+ }
+
+ /**
+ * @param $dbw DatabaseBase
+ * @return void
+ */
+ private function truncate( $dbw ) {
+ $test = $dbw->tableName( 'test' );
+ $dbw->doQuery( "TRUNCATE TABLE $test" );
+ }
+}
+
+$maintClass = "BenchmarkPurge";
+require_once( RUN_MAINTENANCE_IF_MAIN );
\ No newline at end of file