benchmarkPurge.php

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

class BenchmarkPurge extends Benchmarker {

        public function __construct() {
                parent::__construct();
                $this->mDescription = "Benchmark the Squid purge functions.";
        }

        public function execute() {
                global $wgUseSquid, $wgSquidServers;
                if ( !$wgUseSquid ) {
                        $this->error( "Squid purge benchmark doesn't do much without squid support on.", true );
                } else {
                        $this->output( "There are " . count( $wgSquidServers ) . " defined squid servers:\n" );
                        if ( $this->hasOption( 'count' ) ) {
                                $lengths = array( intval( $this->getOption( 'count' ) ) );
                        } else {
                                $lengths = array( 1, 10, 100 );
                        }
                        foreach ( $lengths as $length ) {
                                $urls = $this->randomUrlList( $length );
                                $trial = $this->benchSquid( $urls );
                                $this->output( $trial . "\n" );
                        }
                }
        }

        private function benchSquid( $urls, $trials = 1 ) {
                $start = wfTime();
                for ( $i = 0; $i < $trials; $i++ ) {
                        SquidUpdate::purge( $urls );
                }
                $delta = wfTime() - $start;
                $pertrial = $delta / $trials;
                $pertitle = $pertrial / count( $urls );
                return sprintf( "%4d titles in %6.2fms (%6.2fms each)",
                        count( $urls ), $pertrial * 1000.0, $pertitle * 1000.0 );
        }

        private function randomUrlList( $length ) {
                $list = array();
                for ( $i = 0; $i < $length; $i++ ) {
                        $list[] = $this->randomUrl();
                }
                return $list;
        }

        private function randomUrl() {
                global $wgServer, $wgArticlePath;
                return $wgServer . str_replace( '$1', $this->randomTitle(), $wgArticlePath );
        }

        private function randomTitle() {
                $str = '';
                $length = mt_rand( 1, 20 );
                for ( $i = 0; $i < $length; $i++ ) {
                        $str .= chr( mt_rand( ord( 'a' ), ord( 'z' ) ) );
                }
                return ucfirst( $str );
        }
}

$maintClass = "BenchmarkPurge";
require_once( RUN_MAINTENANCE_IF_MAIN );