benchmarkPurge.php

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<?php
require_once __DIR__ . '/../includes/Benchmarker.php';
 
class BenchmarkPurge extends Benchmarker {
    public function __construct() {
        parent::__construct();
        $this->addDescription( 'Benchmark the CDN purge functions.' );
    }
 
    public function execute() {
        global $wgUseCdn, $wgCdnServers;
 
        if ( !$wgUseCdn ) {
            $this->error( "CDN purge benchmark doesn't do much without CDN support on." );
        } else {
            $this->output( "There are " . count( $wgCdnServers ) . " defined CDN servers:\n" );
            if ( $this->hasOption( 'count' ) ) {
                $lengths = [ intval( $this->getOption( 'count' ) ) ];
            } else {
                $lengths = [ 1, 10, 100 ];
            }
            foreach ( $lengths as $length ) {
                $urls = $this->randomUrlList( $length );
                $trial = $this->benchCdn( $urls );
                $this->output( $trial . "\n" );
            }
        }
    }
 
    private function benchCdn( $urls, $trials = 1 ) {
        $start = microtime( true );
        for ( $i = 0; $i < $trials; $i++ ) {
            CdnCacheUpdate::purge( $urls );
        }
        $delta = microtime( true ) - $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 = [];
        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::class;
require_once RUN_MAINTENANCE_IF_MAIN;