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| 1 | <?php |
| 2 | /** |
| 3 | * Test revision text compression and decompression. |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation; either version 2 of the License, or |
| 8 | * (at your option) any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License along |
| 16 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 17 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| 18 | * http://www.gnu.org/copyleft/gpl.html |
| 19 | * |
| 20 | * @file |
| 21 | * @ingroup Maintenance ExternalStorage |
| 22 | */ |
| 23 | |
| 24 | use MediaWiki\Revision\RevisionRecord; |
| 25 | use MediaWiki\Revision\SlotRecord; |
| 26 | use MediaWiki\Title\Title; |
| 27 | |
| 28 | require_once __DIR__ . '/../Maintenance.php'; |
| 29 | |
| 30 | class TestCompression extends Maintenance { |
| 31 | public function __construct() { |
| 32 | parent::__construct(); |
| 33 | |
| 34 | $this->addArg( 'title', 'The page to test' ); |
| 35 | |
| 36 | $this->addOption( 'type', 'The HistoryBlob subclass to use', false, true ); |
| 37 | $this->addOption( 'start', 'The start date', false, true ); |
| 38 | $this->addOption( 'limit', 'Maximum number of revisions to process', false, true ); |
| 39 | } |
| 40 | |
| 41 | public function execute() { |
| 42 | $lang = $this->getServiceContainer()->getLanguageFactory()->getLanguage( 'en' ); |
| 43 | $title = Title::newFromText( $this->getArg( 0 ) ); |
| 44 | |
| 45 | if ( $this->hasOption( 'start' ) ) { |
| 46 | $start = wfTimestamp( TS_MW, strtotime( $this->getOption( 'start' ) ) ); |
| 47 | echo "Starting from " . $lang->timeanddate( $start ) . "\n"; |
| 48 | } else { |
| 49 | $start = '19700101000000'; |
| 50 | } |
| 51 | if ( $this->hasOption( 'limit' ) ) { |
| 52 | $limit = $this->getOption( 'limit' ); |
| 53 | $untilHappy = false; |
| 54 | } else { |
| 55 | $limit = 1000; |
| 56 | $untilHappy = true; |
| 57 | } |
| 58 | $type = $this->getOption( 'type', ConcatenatedGzipHistoryBlob::class ); |
| 59 | |
| 60 | $dbr = $this->getReplicaDB(); |
| 61 | |
| 62 | $revStore = $this->getServiceContainer()->getRevisionStore(); |
| 63 | $res = $revStore->newSelectQueryBuilder( $dbr ) |
| 64 | ->joinComment() |
| 65 | ->joinPage() |
| 66 | ->where( [ |
| 67 | 'page_namespace' => $title->getNamespace(), |
| 68 | 'page_title' => $title->getDBkey(), |
| 69 | $dbr->expr( 'rev_timestamp', '>', $dbr->timestamp( $start ) ), |
| 70 | ] ) |
| 71 | ->limit( $limit ) |
| 72 | ->caller( __FILE__ )->fetchResultSet(); |
| 73 | |
| 74 | $blob = new $type; |
| 75 | $hashes = []; |
| 76 | $keys = []; |
| 77 | $uncompressedSize = 0; |
| 78 | $t = -microtime( true ); |
| 79 | foreach ( $res as $row ) { |
| 80 | $revRecord = $revStore->newRevisionFromRow( $row ); |
| 81 | $text = $revRecord->getSlot( SlotRecord::MAIN, RevisionRecord::RAW ) |
| 82 | ->getContent() |
| 83 | ->serialize(); |
| 84 | $uncompressedSize += strlen( $text ); |
| 85 | $hashes[$row->rev_id] = md5( $text ); |
| 86 | $keys[$row->rev_id] = $blob->addItem( $text ); |
| 87 | if ( $untilHappy && !$blob->isHappy() ) { |
| 88 | break; |
| 89 | } |
| 90 | } |
| 91 | |
| 92 | $serialized = serialize( $blob ); |
| 93 | $t += microtime( true ); |
| 94 | # print_r( $blob->mDiffMap ); |
| 95 | |
| 96 | printf( "%s\nCompression ratio for %d revisions: %5.2f, %s -> %d\n", |
| 97 | $type, |
| 98 | count( $hashes ), |
| 99 | $uncompressedSize / strlen( $serialized ), |
| 100 | $lang->formatSize( $uncompressedSize ), |
| 101 | strlen( $serialized ) |
| 102 | ); |
| 103 | printf( "Compression time: %5.2f ms\n", $t * 1000 ); |
| 104 | |
| 105 | $t = -microtime( true ); |
| 106 | $blob = unserialize( $serialized ); |
| 107 | foreach ( $keys as $id => $key ) { |
| 108 | $text = $blob->getItem( $key ); |
| 109 | if ( md5( $text ) != $hashes[$id] ) { |
| 110 | echo "Content hash mismatch for rev_id $id\n"; |
| 111 | # var_dump( $text ); |
| 112 | } |
| 113 | } |
| 114 | $t += microtime( true ); |
| 115 | printf( "Decompression time: %5.2f ms\n", $t * 1000 ); |
| 116 | } |
| 117 | } |
| 118 | |
| 119 | $maintClass = TestCompression::class; |
| 120 | require_once RUN_MAINTENANCE_IF_MAIN; |