User blog comment:Brandon Rhea/Making Ads Better: The Basics/@comment-4403232-20170117040902

Something I've noticed (which I'm not sure is an issue with other users as well), is that the ads on Wikia use a TREMENDOUS amount of my computer's power. Literally having two Wikia tabs with ads on causes my browser to lag much harder than 40 tabs of other sites. While the ads that take over an entire background are tacky, and I'm quite annoyed with the ads that get placed in the middle of an article, the performance hit they're dishing out seems like something that should be looked into, and is extremely problematic.