Third-party scripts: the part of your page you do not control
Analytics, chat, maps and fonts cost far more than their size. Three ways to make them cheap, and the ones you must never delay.
Analytics, chat, maps and fonts cost far more than their size. Three ways to make them cheap, and the ones you must never delay.
Images are 60 to 80% of a typical page. Modern formats, on-demand loading, dimensions, and the one image you must never defer.
Sites are rarely slow on day one. Revisions, leftover options, plugins loading everywhere: what accumulates, how to tell which one is hurting, and what to clean up first.
Four measurements, what each one answers, and the order of work that actually pays off — including when to stop.
Your server can answer in ten milliseconds and the page can still look blank. Here is why browsers wait for stylesheets, and what critical CSS actually changes.
A page cache stores the finished HTML so the next visitor gets a file instead of a rebuild. Where in the chain that file is found is what…