Lots of stuff like the below in debug log:

Query my_wiki (10) (slave): SELECT /* ResourceLoaderWikiModule::getTitleMtimes 127.0.0.1 */ page_namespace,page_title,page_touched FROM page WHERE (page_namespace = '8' AND page_title IN ('Common.js','Common.css','Vector.js','Vector.css','Print.css') )
Query my_wiki (11) (slave): SELECT /* ResourceLoaderWikiModule::getTitleMtimes 127.0.0.1 */ page_namespace,page_title,page_touched FROM page WHERE (page_namespace = '8' AND page_title = 'Noscript.css')
Query my_wiki (12) (slave): SELECT /* ResourceLoaderWikiModule::getTitleMtimes 127.0.0.1 */ page_namespace,page_title,page_touched FROM page WHERE (page_namespace = '8' AND page_title = 'Filepage.css')

Should be batched in one request.

Version: 1.21.x
Severity: enhancement