people are not even trying, this image could be a jpg of <=500kb with same quality. use png for icons, text, graphs , but save images as jpg. i see this many

people are not even trying, this image could be a jpg of <=500kb with same quality. use png for icons, text, graphs , but save images as jpg. i see this many times, my rule is to never exceed 150 kb for those "retina" images