Hyperlinks on Efficiency

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Making GitHub’s new homepage quick and performant — Tobias Ahlin describes how the scrolling results are finished extra performantly because of IntersectionObserver and the truth that it avoids using strategies that set off reflows, like getBoundingClientRect. Additionally, WebP + SVG masks!
All the things we find out about Core Net Vitals and search engine optimization — Simon Hearne covers why everyone seems to be so obsessive about CWV proper now: search engine optimization. Simon says one thing I’ve heard a few instances: The Web page Expertise Replace is extra of a carrot strategy than stick — there is no such thing as a direct penalty for failing to satisfy Google’s targets. That’s, you aren’t penalized for poor CWV, however are given a bonus for good numbers. But when everybody round you is getting that bonus besides you, isn’t that the identical as a penalty?
Establishing Cloudflare Staff for internet efficiency optimisation and testing — Matt Hobbs begins with a 101 intro on establishing a Cloudflare Employee, utilizing it to intercept a CSS file and change all of the font-family declarations with Comedian Sans. Possibly that may open your eyes to the chances: if you happen to can manipulate all property like HTML, CSS, and JavaScript, you’ll be able to drive these issues into doing extra performant issues.
Now THAT’S What I Name Service Employee! — Jeremy Wagner units up a “Streaming” Service Employee that caches widespread partials on an internet site (e.g. the header and footer) such that the individuals of Waushara County, Wisconsin, who’ve sluggish web can load the location someplace within the neighborhood of twice as quick. That is constructing upon Philip Walton’s “Smaller HTML Payloads with Service Staff” article.
Who has the quickest F1 web site in 2021? — Jake Archibald’s epic going-on-10-part sequence analyzing the efficiency of F1 racing web sites (oh, the irony). Appears to be like like Purple Bull is within the lead to this point with Ferarri trailing. There’s a lot to study in all these, and it’s considerably cathartic seeing humorous bits like, Their web site was sluggish due to a 1.8MB blocking script, however 1.7MB of that was an inlined 2300×2300 PNG of a horse that was solely ever displayed at 20×20. Additionally, I don’t suppose I knew that Jake was the unique builder of Sprite Cow! (Don’t use that as a result of it seems that sprites are dangerous.)
Actual-world CSS vs. CSS-in-JS efficiency comparability — Tomas Pustelnik seems on the efficiency implications of CSS-in-JS. Or, as I prefer to level out: CSS-in-React, as that’s all the time what it’s since all the opposite massive JavaScript frameworks have their very own blessed styling options. Tomas didn’t evaluate styled-components to hand-written vanilla CSS, however to Linaria, which I might suppose most individuals nonetheless consider as CSS-in-JS — besides that as a substitute of bundling the kinds in JavaScript, it outputs CSS. I agree that, no matter a styling library does for DX, producing CSS looks like the way in which to go for manufacturing. But another excuse I like css-modules. Newer-fancier libs are doing it too.
The Case of the 50ms request — Julia Evans put collectively this interactive puzzle for making an attempt to determine why a server request is taking longer than it ought to. Extra of a back-end factor than front-end, however the troubleshooting steps really feel acquainted. Strive it in your machine, strive it on my machine, see what the server is doing, and so on.

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