Speed kills... if you don't have it.
per @Grunny: apply SlowPagesBlacklist to page preview
whitespace and wfProfileOut
refine extension messages
per @Grunny - covered preview in Monobook
marked Wikia change in core code
per @themech - removed unnecessary return
Merge pull request #2342 from Wikia/CE-530-manual-blacklist-for-slow-pages

Speed kills... if you don't have it.