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   1  <?php
   2  /**
   3   * This program is free software; you can redistribute it and/or modify
   4   * it under the terms of the GNU General Public License as published by
   5   * the Free Software Foundation; either version 2 of the License, or
   6   * (at your option) any later version.
   7   *
   8   * This program is distributed in the hope that it will be useful,
   9   * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  11   * GNU General Public License for more details.
  12   *
  13   * You should have received a copy of the GNU General Public License along
  14   * with this program; if not, write to the Free Software Foundation, Inc.,
  15   * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  16   * http://www.gnu.org/copyleft/gpl.html
  17   *
  18   * @file
  19   * @ingroup Maintenance
  20   */
  21  
  22  require_once  __DIR__ . '/Maintenance.php';
  23  
  24  /**
  25   * @ingroup Maintenance
  26   */
  27  class CompareParserCache extends Maintenance {
  28  	public function __construct() {
  29          parent::__construct();
  30          $this->mDescription = "Parse random pages and compare output to cache.";
  31          $this->addOption( 'namespace', 'Page namespace number', true, true );
  32          $this->addOption( 'maxpages', 'Number of pages to try', true, true );
  33      }
  34  
  35  	public function execute() {
  36          $pages = $this->getOption( 'maxpages' );
  37  
  38          $dbr = $this->getDB( DB_SLAVE );
  39  
  40          $totalsec = 0.0;
  41          $scanned = 0;
  42          $withcache = 0;
  43          $withdiff = 0;
  44          while ( $pages-- > 0 ) {
  45              $row = $dbr->selectRow( 'page', '*',
  46                  array(
  47                      'page_namespace' => $this->getOption( 'namespace' ),
  48                      'page_is_redirect' => 0,
  49                      'page_random >= ' . wfRandom()
  50                  ),
  51                  __METHOD__,
  52                  array(
  53                      'ORDER BY' => 'page_random',
  54                  )
  55              );
  56  
  57              if ( !$row ) {
  58                  continue;
  59              }
  60              ++$scanned;
  61  
  62              $title = Title::newFromRow( $row );
  63              $page = WikiPage::factory( $title );
  64              $revision = $page->getRevision();
  65              $content = $revision->getContent( Revision::RAW );
  66  
  67              $parserOptions = $page->makeParserOptions( 'canonical' );
  68  
  69              $parserOutputOld = ParserCache::singleton()->get( $page, $parserOptions );
  70  
  71              if ( $parserOutputOld ) {
  72                  $t1 = microtime( true );
  73                  $parserOutputNew = $content->getParserOutput(
  74                      $title, $revision->getId(), $parserOptions, false );
  75                  $sec = microtime( true ) - $t1;
  76                  $totalsec += $sec;
  77  
  78                  $this->output( "Parsed '{$title->getPrefixedText()}' in $sec seconds.\n" );
  79  
  80                  $this->output( "Found cache entry found for '{$title->getPrefixedText()}'..." );
  81                  $oldHtml = trim( preg_replace( '#<!-- .+-->#Us', '', $parserOutputOld->getText() ) );
  82                  $newHtml = trim( preg_replace( '#<!-- .+-->#Us', '', $parserOutputNew->getText() ) );
  83                  $diff = wfDiff( $oldHtml, $newHtml );
  84                  if ( strlen( $diff ) ) {
  85                      $this->output( "differences found:\n\n$diff\n\n" );
  86                      ++$withdiff;
  87                  } else {
  88                      $this->output( "No differences found.\n" );
  89                  }
  90                  ++$withcache;
  91              } else {
  92                  $this->output( "No parser cache entry found for '{$title->getPrefixedText()}'.\n" );
  93              }
  94          }
  95  
  96          $ave = $totalsec ? $totalsec / $scanned : 0;
  97          $this->output( "Checked $scanned pages; $withcache had prior cache entries.\n" );
  98          $this->output( "Pages with differences found: $withdiff\n" );
  99          $this->output( "Average parse time: $ave sec\n" );
 100      }
 101  }
 102  
 103  $maintClass = "CompareParserCache";
 104  require_once RUN_MAINTENANCE_IF_MAIN;