Monitoring your sites for key performance metrics like Page Load or Visually Complete is important, because it helps uncover errors, outages, and critical defects. When performance degrades, you have to figure out why. While reading a waterfall diagram can help provide insight into what the browser was doing, you are still trying to reconstruct what the user experienced by looking at a timeline showing when a browser requested and received content. This is kind of like trying to experience a Broadway musical by only reading the sheet music. To...

Read More