If bloat is your true problem, having cpu say 5% faster won't solve anything at all. On Android, you can at least revert to clean Lionage/whatever Android installation for most devices, and all folks report remarkable improvement of overall speed of device, sometimes also battery life.

Also, I don't get the phone 'workflow' where you heavily depend on computing power to render some web pages faster. Connection reliability is usually much bigger factor if that's what you really do (which is strange but maybe I am not a typical phone user).