Whatever happened to the programming rule of don&#x27;t micro-optimize until you&#x27;ve measured the performance? There seems to be a lot of recommendations to do ugly things to websites in the name of optimization, but they still add complications that are hard to understand. Pictures used to by supposed to be optimized by pre-scaling them to the size they&#x27;d be displayed at. Now we have retina displays and that doesn&#x27;t work anymore. You have to do more complicated things instead. HTML and co has become very low level-like and almost complex enough that perhaps humans shouldn&#x27;t be doing it. It reminds me of the days of assembly language and all the ugly little tricks to squeeze out more clock cycles that are now handled by compilers.