Slow connections change how your site feels

My site feels instant on my office wifi, so I have no idea what it's like for someone on a weak signal.

IntermediateRead 5 minDoing: about 45 minutes6 steps

What you'll have at the end

A recording of your page loading on a throttled slow connection, with the worst delay identified.

Before you start

You need

A page you can reload as many times as you need, open in Chrome with DevTools available.

Not covered

Deciding how to shrink, defer, or replace the resource you find; this only locates and proves which phase of the load actually costs the most time.

Leans on

6 steps

Trim the unused CSS out of a bloated stylesheet

once you've confirmed the network cost, this covers a separate weight problem on the same page: CSS you ship but never use.

Checked 20 Aug 2026