Most mobile users have some kind of capped data plan and being frugal with every megabyte is important to keeping costs low. Google is now enabling compression for their Chrome browser on IOS. 

I have been testing this compression feature on the Google Chrome beta on Android for some time and am very happy they are making it available on IOS. It basically passes all traffic through a Google proxy that removes non-essential content from web streams (i.e. whitespace, comments, metadata, etc). Google claims data reduction of up to 50% but my real world experience (on Android) is about 20-37%.

Maybe this will push Apple to implement something similar on Mobile Safari.