SDU Kolding website loads on throttled iPhone in 30 seconds.Just by saving as JPG – here using squoosh.app – filesize is down 89%The mobile viewport width of this iPhone is 375px (device pixel ratio:2)Properly formatted for mobile, hero image is 98% smaller.
Images: their sizes and formats
Immense reduction can be achieved by taking a close look at image formats and responsive techniques.
