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Paul Irish
@paul_irish
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Find me elsewhere: 🦋 @paul.irish — 🐘 @[email protected] I 💗 the web • I work on performance, Chrome DevTools, Lighthouse, and PageSpeed Insights.
Joined March 2007
@jwajsberg You're 100% right. :) It was entirely Firefox DevTools that inspired those features and their UI. Thanks for making it so powerful and well-crafted!
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@WebTwitr @nomsternom @anniesullie @gilberto_cocchi The firstUIEventTimestamp can happen before the starttime, after the starttime, or.. not at all. When it's before (like this), it does suggest there was an input delay on an interaction that sits within this LoAF.
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@steveruizok You can do it on CI machines, but.. they are usually resource-constrained, which leads to a bit higher variability. Still; probably ok if the tests are very focused.
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RT @kh_kirill: Today, @ChromeDevTools forever changed the way we approach performance optimizations.
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@WebTwitr @tunetheweb @anniesullie Parsing trace data is hard. Real tough. I'd recommend using the trace engine that we use within DevTools. It's not released/official/supported, but I trust you'll be capable with it:
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@igobylukas @tunetheweb @addyosmani Yes according to my own investigation, Nostra is definitely delivering very different content to Lighthouse in order to get much better scores. This "cloaking" is dumb as it's 1) gaming purely for Lighthouse score and 2) the score itself has no effect on SEO.
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@LoukilAymen @AmreeZaid @TheRealNooshu @WebPerfRecipes @EthanGardner @addyosmani @jecfish @tunetheweb @tameverts @____lighthouse me too me too. :)
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@leeerob Nice UX on the layout shift reporting! You got a designer who wanted to challenge the status quo and I appreciate it. :)
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