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<?php |
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/** |
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* Benchmark for Squid purge. |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License along |
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* with this program; if not, write to the Free Software Foundation, Inc., |
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
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* http://www.gnu.org/copyleft/gpl.html |
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* |
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* @file |
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* @ingroup Benchmark |
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*/ |
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require_once __DIR__ . '/Benchmarker.php'; |
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/** |
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* Maintenance script that benchmarks Squid purge. |
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* |
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* @ingroup Benchmark |
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*/ |
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class BenchmarkPurge extends Benchmarker { |
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public function __construct() { |
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parent::__construct(); |
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$this->addDescription( 'Benchmark the Squid purge functions.' ); |
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} |
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public function execute() { |
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global $wgUseSquid, $wgSquidServers; |
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if ( !$wgUseSquid ) { |
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$this->error( "Squid purge benchmark doesn't do much without squid support on.", true ); |
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} else { |
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$this->output( "There are " . count( $wgSquidServers ) . " defined squid servers:\n" ); |
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if ( $this->hasOption( 'count' ) ) { |
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$lengths = [ intval( $this->getOption( 'count' ) ) ]; |
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} else { |
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$lengths = [ 1, 10, 100 ]; |
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} |
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foreach ( $lengths as $length ) { |
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$urls = $this->randomUrlList( $length ); |
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$trial = $this->benchSquid( $urls ); |
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$this->output( $trial . "\n" ); |
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} |
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} |
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} |
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/** |
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* Run a bunch of URLs through SquidUpdate::purge() |
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* to benchmark Squid response times. |
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* @param array $urls A bunch of URLs to purge |
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* @param int $trials How many times to run the test? |
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* @return string |
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*/ |
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private function benchSquid( $urls, $trials = 1 ) { |
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$start = microtime( true ); |
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for ( $i = 0; $i < $trials; $i++ ) { |
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CdnCacheUpdate::purge( $urls ); |
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} |
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$delta = microtime( true ) - $start; |
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$pertrial = $delta / $trials; |
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$pertitle = $pertrial / count( $urls ); |
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return sprintf( "%4d titles in %6.2fms (%6.2fms each)", |
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count( $urls ), $pertrial * 1000.0, $pertitle * 1000.0 ); |
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} |
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/** |
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* Get an array of randomUrl()'s. |
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* @param int $length How many urls to add to the array |
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* @return array |
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*/ |
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private function randomUrlList( $length ) { |
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$list = []; |
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for ( $i = 0; $i < $length; $i++ ) { |
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$list[] = $this->randomUrl(); |
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} |
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return $list; |
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} |
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/** |
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* Return a random URL of the wiki. Not necessarily an actual title in the |
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* database, but at least a URL that looks like one. |
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* @return string |
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*/ |
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private function randomUrl() { |
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global $wgServer, $wgArticlePath; |
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return $wgServer . str_replace( '$1', $this->randomTitle(), $wgArticlePath ); |
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} |
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/** |
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* Create a random title string (not necessarily a Title object). |
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* For use with randomUrl(). |
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* @return string |
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*/ |
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private function randomTitle() { |
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$str = ''; |
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$length = mt_rand( 1, 20 ); |
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for ( $i = 0; $i < $length; $i++ ) { |
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$str .= chr( mt_rand( ord( 'a' ), ord( 'z' ) ) ); |
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} |
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return ucfirst( $str ); |
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} |
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} |
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$maintClass = "BenchmarkPurge"; |
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require_once RUN_MAINTENANCE_IF_MAIN; |
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wikimedia /
mediawiki
The PSR-1: Basic Coding Standard recommends that a file should either introduce new symbols, that is classes, functions, constants or similar, or have side effects. Side effects are anything that executes logic, like for example printing output, changing ini settings or writing to a file.
The idea behind this recommendation is that merely auto-loading a class should not change the state of an application. It also promotes a cleaner style of programming and makes your code less prone to errors, because the logic is not spread out all over the place.
To learn more about the PSR-1, please see the PHP-FIG site on the PSR-1.