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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 | use MediaWiki\Title\Title; |
| 25 | use Wikimedia\Diff\Diff; |
| 26 | use Wikimedia\Diff\UnifiedDiffFormatter; |
| 27 | |
| 28 | /** |
| 29 | * @ingroup Maintenance |
| 30 | */ |
| 31 | class CompareParserCache extends Maintenance { |
| 32 | public function __construct() { |
| 33 | parent::__construct(); |
| 34 | $this->addDescription( 'Parse random pages and compare output to cache.' ); |
| 35 | $this->addOption( 'namespace', 'Page namespace number', true, true ); |
| 36 | $this->addOption( 'maxpages', 'Number of pages to try', true, true ); |
| 37 | } |
| 38 | |
| 39 | public function execute() { |
| 40 | $pages = $this->getOption( 'maxpages' ); |
| 41 | |
| 42 | $dbr = $this->getReplicaDB(); |
| 43 | |
| 44 | $totalsec = 0.0; |
| 45 | $scanned = 0; |
| 46 | $withcache = 0; |
| 47 | $withdiff = 0; |
| 48 | $services = $this->getServiceContainer(); |
| 49 | $parserCache = $services->getParserCache(); |
| 50 | $renderer = $services->getRevisionRenderer(); |
| 51 | $wikiPageFactory = $services->getWikiPageFactory(); |
| 52 | while ( $pages-- > 0 ) { |
| 53 | $row = $dbr->newSelectQueryBuilder() |
| 54 | // @todo Title::selectFields() or Title::getQueryInfo() or something |
| 55 | ->select( [ |
| 56 | 'page_namespace', |
| 57 | 'page_title', |
| 58 | 'page_id', |
| 59 | 'page_len', |
| 60 | 'page_is_redirect', |
| 61 | 'page_latest', |
| 62 | ] ) |
| 63 | ->from( 'page' ) |
| 64 | ->where( [ |
| 65 | 'page_namespace' => $this->getOption( 'namespace' ), |
| 66 | 'page_is_redirect' => 0, |
| 67 | 'page_random >= ' . wfRandom() |
| 68 | ] ) |
| 69 | ->orderBy( 'page_random' ) |
| 70 | ->caller( __METHOD__ )->fetchRow(); |
| 71 | |
| 72 | if ( !$row ) { |
| 73 | continue; |
| 74 | } |
| 75 | ++$scanned; |
| 76 | |
| 77 | $title = Title::newFromRow( $row ); |
| 78 | $page = $wikiPageFactory->newFromTitle( $title ); |
| 79 | $revision = $page->getRevisionRecord(); |
| 80 | $parserOptions = $page->makeParserOptions( 'canonical' ); |
| 81 | |
| 82 | $parserOutputOld = $parserCache->get( $page, $parserOptions ); |
| 83 | |
| 84 | if ( $parserOutputOld ) { |
| 85 | $t1 = microtime( true ); |
| 86 | $parserOutputNew = $renderer->getRenderedRevision( $revision, $parserOptions ) |
| 87 | ->getRevisionParserOutput(); |
| 88 | |
| 89 | $sec = microtime( true ) - $t1; |
| 90 | $totalsec += $sec; |
| 91 | |
| 92 | $this->output( "Parsed '{$title->getPrefixedText()}' in $sec seconds.\n" ); |
| 93 | |
| 94 | $this->output( "Found cache entry found for '{$title->getPrefixedText()}'..." ); |
| 95 | |
| 96 | $oldHtml = trim( preg_replace( '#<!-- .+-->#Us', '', $parserOutputOld->getText() ) ); |
| 97 | $newHtml = trim( preg_replace( '#<!-- .+-->#Us', '', $parserOutputNew->getText() ) ); |
| 98 | $diffs = new Diff( explode( "\n", $oldHtml ), explode( "\n", $newHtml ) ); |
| 99 | $formatter = new UnifiedDiffFormatter(); |
| 100 | $unifiedDiff = $formatter->format( $diffs ); |
| 101 | |
| 102 | if ( strlen( $unifiedDiff ) ) { |
| 103 | $this->output( "differences found:\n\n$unifiedDiff\n\n" ); |
| 104 | ++$withdiff; |
| 105 | } else { |
| 106 | $this->output( "No differences found.\n" ); |
| 107 | } |
| 108 | ++$withcache; |
| 109 | } else { |
| 110 | $this->output( "No parser cache entry found for '{$title->getPrefixedText()}'.\n" ); |
| 111 | } |
| 112 | } |
| 113 | |
| 114 | $ave = $totalsec ? $totalsec / $scanned : 0; |
| 115 | $this->output( "Checked $scanned pages; $withcache had prior cache entries.\n" ); |
| 116 | $this->output( "Pages with differences found: $withdiff\n" ); |
| 117 | $this->output( "Average parse time: $ave sec\n" ); |
| 118 | } |
| 119 | } |
| 120 | |
| 121 | $maintClass = CompareParserCache::class; |
| 122 | require_once RUN_MAINTENANCE_IF_MAIN; |