When debugging something unrelated, I noticed that a a web request typically querying the same fields twice for the wiki page associated with it.
```name= WikiPage::pageData,lines=10
SELECT page_id,page_namespace,page_title, page_restrictions,page_is_redirect,page_is_new,page_random,page_touched,page_links_updated,page_latest,page_len, page_content_model,page_lang
FROM `page`
WHERE page_namespace = '#' AND page_title = '#######'
LIMIT 1
master: false
trace:
#0 /srv/mediawiki/php-1.32.0-wmf.24/includes/libs/rdbms/database/Database.php(1181): Wikimedia\Rdbms\Database->doProfiledQuery()
#1 /srv/mediawiki/php-1.32.0-wmf.24/includes/libs/rdbms/database/Database.php(1682): Wikimedia\Rdbms\Database->query()
#2 /srv/mediawiki/php-1.32.0-wmf.24/includes/libs/rdbms/database/Database.php(1773): Wikimedia\Rdbms\Database->select()
#3 /srv/mediawiki/php-1.32.0-wmf.24/includes/page/WikiPage.php(421): Wikimedia\Rdbms\Database->selectRow()
#4 /srv/mediawiki/php-1.32.0-wmf.24/includes/page/WikiPage.php(440): WikiPage->pageData()
#5 /srv/mediawiki/php-1.32.0-wmf.24/includes/page/WikiPage.php(478): WikiPage->pageDataFromTitle()
#6 /srv/mediawiki/php-1.32.0-wmf.24/includes/page/WikiPage.php(590): WikiPage->loadPageData()
#7 /srv/mediawiki/php-1.32.0-wmf.24/includes/page/WikiPage.php(631): WikiPage->exists()
#8 /srv/mediawiki/php-1.32.0-wmf.24/includes/page/WikiPage.php(269): WikiPage->getContentModel()
#9 /srv/mediawiki/php-1.32.0-wmf.24/includes/page/WikiPage.php(256): WikiPage->getContentHandler()
#10 /srv/mediawiki/php-1.32.0-wmf.24/includes/actions/Action.php(98): WikiPage->getActionOverrides()
#11 /srv/mediawiki/php-1.32.0-wmf.24/includes/actions/Action.php(156): Action::factory()
#12 /srv/mediawiki/php-1.32.0-wmf.24/includes/MediaWiki.php(155): Action::getActionName()
#13 /srv/mediawiki/php-1.32.0-wmf.24/includes/MediaWiki.php(785): MediaWiki->getAction()
#14 /srv/mediawiki/php-1.32.0-wmf.24/includes/MediaWiki.php(525): MediaWiki->main()
#15 /srv/mediawiki/php-1.32.0-wmf.24/index.php(42): MediaWiki->run()
```
```name= Title::newFromID,lines=10
SELECT page_namespace,page_title,page_id,page_len,page_is_redirect,page_latest,page_content_model,page_lang FROM `page` WHERE page_id = '#####' LIMIT 1
master: false
trace:
#1 /srv/mediawiki/php-1.32.0-wmf.24/includes/libs/rdbms/database/Database.php(1682): Wikimedia\Rdbms\Database->query()
#2 /srv/mediawiki/php-1.32.0-wmf.24/includes/libs/rdbms/database/Database.php(1773): Wikimedia\Rdbms\Database->select()
#3 /srv/mediawiki/php-1.32.0-wmf.24/includes/Title.php(434): Wikimedia\Rdbms\Database->selectRow()
#4 /srv/mediawiki/php-1.32.0-wmf.24/includes/Storage/RevisionStore.php(337): Title::newFromID()
#5 /srv/mediawiki/php-1.32.0-wmf.24/includes/Storage/RevisionStore.php(1749): MediaWiki\Storage\RevisionStore->getTitle()
#6 /srv/mediawiki/php-1.32.0-wmf.24/includes/Storage/RevisionStore.php(2107): MediaWiki\Storage\RevisionStore->newRevisionFromRow()
#7 /srv/mediawiki/php-1.32.0-wmf.24/includes/Storage/RevisionStore.php(1508): MediaWiki\Storage\RevisionStore->loadRevisionFromConds()
#8 /srv/mediawiki/php-1.32.0-wmf.24/includes/Revision.php(134): MediaWiki\Storage\RevisionStore->getRevisionByTitle()
#9 /srv/mediawiki/php-1.32.0-wmf.24/includes/actions/RawAction.php(167): Revision::newFromTitle()
#10 /srv/mediawiki/php-1.32.0-wmf.24/includes/actions/RawAction.php(134): RawAction->getRawText()
#11 /srv/mediawiki/php-1.32.0-wmf.24/includes/actions/FormlessAction.php(43): RawAction->onView()
#12 /srv/mediawiki/php-1.32.0-wmf.24/includes/MediaWiki.php(501): FormlessAction->show()
#13 /srv/mediawiki/php-1.32.0-wmf.24/includes/MediaWiki.php(294): MediaWiki->performAction()
#14 /srv/mediawiki/php-1.32.0-wmf.24/includes/MediaWiki.php(868): MediaWiki->performRequest()
#15 /srv/mediawiki/php-1.32.0-wmf.24/includes/MediaWiki.php(525): MediaWiki->main()
#16 /srv/mediawiki/php-1.32.0-wmf.24/index.php(42): MediaWiki->run()
```
In this case, the request was for `index.php?action=raw`.
Seems like this the first query from WikiPage should've populated the LinkCache used by Title, given the latter only needs a subset of the same information.