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<?php /** * Benchmark for CDN purge. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. * http://www.gnu.org/copyleft/gpl.html * * @file * @ingroup Benchmark */ // @codeCoverageIgnoreStart require_once __DIR__ . '/../includes/Benchmarker.php'; // @codeCoverageIgnoreEnd use MediaWiki\Deferred\CdnCacheUpdate; /** * Maintenance script that benchmarks CDN purge. * * @ingroup Benchmark */ 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" ); } } } /** * Run a bunch of URLs through CdnCacheUpdate::purge() * to benchmark CDN response times. * @param array $urls A bunch of URLs to purge * @param int $trials How many times to run the test? * @return string */ 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 ); } /** * Get an array of randomUrl()'s. * @param int $length How many urls to add to the array * @return array */ private function randomUrlList( $length ) { $list = []; for ( $i = 0; $i < $length; $i++ ) { $list[] = $this->randomUrl(); } return $list; } /** * Return a random URL of the wiki. Not necessarily an actual title in the * database, but at least a URL that looks like one. * @return string */ private function randomUrl() { global $wgServer, $wgArticlePath; return $wgServer . str_replace( '$1', $this->randomTitle(), $wgArticlePath ); } /** * Create a random title string (not necessarily a Title object). * For use with randomUrl(). * @return string */ 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 ); } } // @codeCoverageIgnoreStart $maintClass = BenchmarkPurge::class; require_once RUN_MAINTENANCE_IF_MAIN; // @codeCoverageIgnoreEnd
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