The Second Corweb Vital

There are lots of moving parts in modern web sites, and you need to think about them. First imple delay measures the time from the first interaction that the visitor has with a wet page until the browser can process that request. If your main thread is busy because it's running a lot of java scrip, then if the user clicks on something, then they'll get a poor fihtee. In the case of flat design, things really annoying about this is pretty much all al cues are eliminated.