It's been a long time now but I was helping a group at a company I worked for optimized page load time. We used some Google tools to give "insights" as to what

It's been a long time now but I was helping a group at a company I worked for optimized page load time. We used some Google tools to give "insights" as to what we should change. The main change it recommended was to not load any resource like Javascript from Google as it was slowing down the page.