benchmarkHooks.php

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<?php
require_once( dirname( __FILE__ ) . '/Benchmarker.php' );

class BenchmarkHooks extends Benchmarker {

        public function __construct() {
                parent::__construct();
                $this->mDescription = 'Benchmark MediaWiki Hooks.';
        }

        public function execute() {
                global $wgHooks;
                $wgHooks['Test'] = array();

                $time = $this->benchHooks();
                $this->output( 'Empty hook: ' . $time . "\n" );

                $wgHooks['Test'][] = array( $this, 'test' );
                $time = $this->benchHooks();
                $this->output( 'Loaded (one) hook: ' . $time . "\n" );

                for( $i = 0; $i < 9; $i++ ) {
                        $wgHooks['Test'][] = array( $this, 'test' );
                }
                $time = $this->benchHooks();
                $this->output( 'Loaded (ten) hook: ' . $time . "\n" );

                for( $i = 0; $i < 90; $i++ ) {
                        $wgHooks['Test'][] = array( $this, 'test' );
                }
                $time = $this->benchHooks();
                $this->output( 'Loaded (one hundred) hook: ' . $time . "\n" );
                $this->output( "\n" );
        }

        private function benchHooks( $trials = 10 ) {
                $start = wfTime();
                for ( $i = 0; $i < $trials; $i++ ) {
                        wfRunHooks( 'Test' );
                }
                $delta = wfTime() - $start;
                $pertrial = $delta / $trials;
                return sprintf( "Took %6.2fs",
                        $pertrial );
        }

        public function test() {
                return true;
        }
}

$maintClass = 'BenchmarkHooks';
require_once( RUN_MAINTENANCE_IF_MAIN );