Faster Images using HTTP2 and Progressive JPEGs
It's worth balancing this against other research showing that users often don't like the experience provided by progressive image rendering:<p><a href="http://www.webperformancetoday.com/2014/09/17/progressive-image-rendering-good-evil/" rel="nofollow">http://www.webperformancetoday.com/2014/09/17/progressive-im...</a>