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<?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';
/**
* @ingroup Maintenance
*/
class CompareParserCache extends Maintenance {
public function __construct() {
parent::__construct();
$this->mDescription = "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_SLAVE );
$totalsec = 0.0;
$scanned = 0;
$withcache = 0;
$withdiff = 0;
while ( $pages-- > 0 ) {
$row = $dbr->selectRow( 'page', '*',
array(
'page_namespace' => $this->getOption( 'namespace' ),
'page_is_redirect' => 0,
'page_random >= ' . wfRandom()
),
__METHOD__,
array(
'ORDER BY' => 'page_random',
)
);
if ( !$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::singleton()->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;
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