maintenance/compareParserCache.php

   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                 while ( $pages-- > 0 ) {
  44                         $row = $dbr->selectRow( 'page', '*',
  45                                 array(
  46                                         'page_namespace' => $this->getOption( 'namespace' ),
  47                                         'page_is_redirect' => 0,
  48                                         'page_random >= ' . wfRandom()
  49                                 ),
  50                                 __METHOD__,
  51                                 array(
  52                                         'ORDER BY' => 'page_random',
  53                                 )
  54                         );
  55
  56                         if ( !$row ) {
  57                                 continue;
  58                         }
  59                         ++$scanned;
  60
  61                         $title = Title::newFromRow( $row );
  62                         $page = WikiPage::factory( $title );
  63                         $revision = $page->getRevision();
  64                         $content = $revision->getContent( Revision::RAW );
  65
  66                         $parserOptions = $page->makeParserOptions( 'canonical' );
  67
  68                         $parserOutputOld = ParserCache::singleton()->get( $page, $parserOptions );
  69
  70                         $t1 = microtime( true );
  71                         $parserOutputNew = $content->getParserOutput(
  72                                 $title, $revision->getId(), $parserOptions, false );
  73                         $sec = microtime( true ) - $t1;
  74                         $totalsec += $sec;
  75
  76                         $this->output( "Parsed '{$title->getPrefixedText()}' in $sec seconds.\n" );
  77
  78                         if ( $parserOutputOld ) {
  79                                 $this->output( "Found cache entry found for '{$title->getPrefixedText()}'..." );
  80                                 $oldHtml = trim( preg_replace( '#<!-- .+-->#Us', '', $parserOutputOld->getText() ) );
  81                                 $newHtml = trim( preg_replace( '#<!-- .+-->#Us', '',$parserOutputNew->getText() ) );
  82                                 $diff = wfDiff( $oldHtml, $newHtml );
  83                                 if ( strlen( $diff ) ) {
  84                                         $this->output( "differences found:\n\n$diff\n\n" );
  85                                 } else {
  86                                         $this->output( "No differences found.\n" );
  87                                 }
  88                                 ++$withcache;
  89                         } else {
  90                                 $this->output( "No parser cache entry found for '{$title->getPrefixedText()}'.\n" );
  91                         }
  92                 }
  93
  94                 $ave = $scanned ? $totalsec / $scanned : 0;
  95                 $this->output( "Checked $scanned pages; $withcache had prior cache entries.\n" );
  96                 $this->output( "Average parse time: $ave sec\n" );
  97         }
  98 }
  99
 100 $maintClass = "CompareParserCache";
 101 require_once RUN_MAINTENANCE_IF_MAIN;