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slightlyoff@toot.cafe ("Alex Russell") wrote:
Something like a good 5% of my job is giving people tours of what WebPageTest.org (and our internal version for MSFT) can do.
If you're working on the web, it's worth your time trying to decipher what WPT is trying to show you. I recommend starting with a site you own and can edit, using the "simple" mobile config, and focusing on the flimstrip section (initially). Learning where the time goes is invaluable.
See also @TheRealNooshu's masterly post on the topic:
https://nooshu.com/blog/2019/10/02/how-to-read-a-wpt-waterfall-chart/