MediaWiki 1.30.2

[autoinstallsdev/mediawiki.git] / maintenance / compareParserCache.php

diff --git a/maintenance/compareParserCache.php b/maintenance/compareParserCache.php
new file mode 100644 (file)
index 0000000..504c7d7
--- /dev/null
+++ b/maintenance/compareParserCache.php
@@ -0,0 +1,107 @@
+<?php
+/**
+ * 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 Maintenance
+ */
+
+require_once __DIR__ . '/Maintenance.php';
+
+use MediaWiki\MediaWikiServices;
+
+/**
+ * @ingroup Maintenance
+ */
+class CompareParserCache extends Maintenance {
+       public function __construct() {
+               parent::__construct();
+               $this->addDescription( 'Parse random pages and compare output to cache.' );
+               $this->addOption( 'namespace', 'Page namespace number', true, true );
+               $this->addOption( 'maxpages', 'Number of pages to try', true, true );
+       }
+
+       public function execute() {
+               $pages = $this->getOption( 'maxpages' );
+
+               $dbr = $this->getDB( DB_REPLICA );
+
+               $totalsec = 0.0;
+               $scanned = 0;
+               $withcache = 0;
+               $withdiff = 0;
+               $parserCache = MediaWikiServices::getInstance()->getParserCache();
+               while ( $pages-- > 0 ) {
+                       $row = $dbr->selectRow( 'page', '*',
+                               [
+                                       'page_namespace' => $this->getOption( 'namespace' ),
+                                       'page_is_redirect' => 0,
+                                       'page_random >= ' . wfRandom()
+                               ],
+                               __METHOD__,
+                               [
+                                       'ORDER BY' => 'page_random',
+                               ]
+                       );
+
+                       if ( !$row ) {
+                               continue;
+                       }
+                       ++$scanned;
+
+                       $title = Title::newFromRow( $row );
+                       $page = WikiPage::factory( $title );
+                       $revision = $page->getRevision();
+                       $content = $revision->getContent( Revision::RAW );
+
+                       $parserOptions = $page->makeParserOptions( 'canonical' );
+
+                       $parserOutputOld = $parserCache->get( $page, $parserOptions );
+
+                       if ( $parserOutputOld ) {
+                               $t1 = microtime( true );
+                               $parserOutputNew = $content->getParserOutput(
+                                       $title, $revision->getId(), $parserOptions, false );
+                               $sec = microtime( true ) - $t1;
+                               $totalsec += $sec;
+
+                               $this->output( "Parsed '{$title->getPrefixedText()}' in $sec seconds.\n" );
+
+                               $this->output( "Found cache entry found for '{$title->getPrefixedText()}'..." );
+                               $oldHtml = trim( preg_replace( '#<!-- .+-->#Us', '', $parserOutputOld->getText() ) );
+                               $newHtml = trim( preg_replace( '#<!-- .+-->#Us', '', $parserOutputNew->getText() ) );
+                               $diff = wfDiff( $oldHtml, $newHtml );
+                               if ( strlen( $diff ) ) {
+                                       $this->output( "differences found:\n\n$diff\n\n" );
+                                       ++$withdiff;
+                               } else {
+                                       $this->output( "No differences found.\n" );
+                               }
+                               ++$withcache;
+                       } else {
+                               $this->output( "No parser cache entry found for '{$title->getPrefixedText()}'.\n" );
+                       }
+               }
+
+               $ave = $totalsec ? $totalsec / $scanned : 0;
+               $this->output( "Checked $scanned pages; $withcache had prior cache entries.\n" );
+               $this->output( "Pages with differences found: $withdiff\n" );
+               $this->output( "Average parse time: $ave sec\n" );
+       }
+}
+
+$maintClass = "CompareParserCache";
+require_once RUN_MAINTENANCE_IF_MAIN;