Why Third-Party browsers, Including Chrome, are Slower Than the Default Safari in iOS
Most people have a favorite browser that they like to use on all of their devices, whether it be Google Chrome, Mozilla Firefox, or Internet Explorer. Unfortunately for iOS users, Apple does not currently appear to be concerned about your web browsing preferences, and it doesn't appear that they'll begin to care any time soon.
Apple's own Safari app is the native web browser on the iOS operating system, and although it is not a bad browser on any device or operating system, for some reason it is always faster than any other browser within iOS. Many people are confused as to why no other browser can load pages as fast as Safari on their iPhone or iPad when their PC loads pages faster in Chrome. The answers may actually surprise you...
All Browsers in iOS Must Use the Safari Rendering Engine
You Can Only Make Safari Your Default Browser
Since iOS does not let you choose your default apps, you could never set Google Chrome or Internet Explorer as your default browser; Safari will always be the browser that launches when you decide to view a web page or click a link on your iPad or iPhone. However, in many apps there are options that let you choose which browser you'd like to use when accessing the web within the app, so that is one potential workaround.
No Add-Ons for Non-Safari Browsers
As if the above restrictions aren't totalitarian enough, Apple basically strips the value from all competing browsers by not allowing them to use add-ons. So all of those cool extras that make Chrome so convenient on your PC or Mac are completely nonexistent in the iOS operating system.