Using WebPageTest

"Using WebPageTest" is officially done! Hard copies are shipping today. Get yours at usingwpt.com #webperf

Most developers seem to get srcset right, but too many get sizes wrong. Learn more about these trends and much more in the Media chapter of the Web Almanac, co-authored by our very own @etportis! cloudinary.buzz/xVVR50IBvGV

@blue2blond To clarify, this account is the book. @RealWebPageTest is the tool itself 😅

Additional JS, CSS and lazyloading was only executed on some specific events (scroll + touchstart). But not (line 237) when navigator.platform was equal to "Linux x86_64". So did a iOS @usingwpt test and all other resources popped in too, now to a total of 95 resources 🧐

🥳🎂 Happy 10th birthday HTTP Archive!! Ten years ago today, @Souders ran the first crawl consisting of 16,656 URLs. Since then, we've been tracking how the web is built with 213 crawls and growing to 7,594,681 URLs! Help us celebrate by sharing your HTTP Archive story 👇

🚨 Two chapters of the 2020 Web Almanac are now available for early access: Markup and Capabilities! This is our second annual data-driven report on the state of the web, with 20+ chapters written by web community experts. 👇 See the links below and let us know what you think!

New blog post by me: Fixing a legacy HTTP/1.1 server configuration with @Cloudflare Workers. nooshu.github.io/blog/2020/11/0… #webperf #perfmatters

I am happy to announce that my new Web Performance team is looking for a Senior Software Engineer: smrtr.io/4x-Mb

Now this is really cool! Followed @AndyDavies latest blog post on WebPageTest and @Cloudflare Workers to test the perceived performance difference the `font-display` property has on GOV.UK. No redeploy to production needed! #webfonts #webperf #perfmatters

We'll be going live this Thursday at 1pm ET for a Q&A with @patmeenan and @mdaoudi on Webpagetest. Tell us what burning questions you have in the comments below.

Speaking of WebPageTest, watching an April 2020 talk from @patmeenan from a WPT walk through w/ @mozilla's @davehunt82 for an edition of Automationeers. #webperf #perfmatters youtu.be/hgKsaIGGfMc

You want to run a test with WebPageTest but the waiting is long? Check webpagetest.org/getLocations.p… to choose a free or less used resource (browser/location). #webperf #tip

Another set of updates to my 'How to read a WebPageTest Waterfall View chart': • Examining undefined 204 status codes • Service Worker precache slowing a page load • How to view a sites HTTP/2 dependency graph nooshu.github.io/blog/2019/10/0… #webperf #perfmatters

How do you feel about Catchpoint's acquisition of WebPageTest?

We're thrilled to announce Catchpoint has signed an aggreement with @patmeenan to acquire the hugely popular Webpagetest.org. Get the details here: bit.ly/3iGoMCs

@matthewcp @passle_ What WPT best practices do you disagree with? They tend to flag only the most inexcusable performance antipatterns like disabling TCP Keep-Alive, not using gzip, not caching, etc. Hard to argue with those. Can you give an example of a data-based score you'd prefer instead?

@passle_ I ignore lighthouse best practices because I disagree with many of them. Ditto for webpagetest. Wish the scores were derived from data and not opinions :/

In the context of reloading the page when a new service worker has taken over. We use the following code to reload on controllerchange. But this will freak out lighthouse's best practices, because of the reload apparently. How are other people dealing with reloading on update?

@MachMetrics WebPageTest...😲

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