Erm - how would it slow down people's code? We're already doing a check to see if a tag name is being used and optimize based upon that, we just added one addit

Erm - how would it slow down people's code? We're already doing a check to see if a tag name is being used and optimize based upon that, we just added one additional check to optimize for body. There is absolutely no way in which the check: if ( selector === "body" && !context ) ... Will have performance implications in your application.