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In Defence of DOM­Content­Loaded

CSS Wizardry

I never thought I’d write an article in defence of DOMContentLoaded , but here it is… For many, many years now, performance engineers have been making a concerted effort to move away from technical metrics such as Load , and toward more user-facing, UX metrics such as Speed Index or Largest Contentful Paint. Or are they…?

Metrics 326
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Core Web Vitals Tools To Boost Your Web Performance Scores

Smashing Magazine

Essentially, a web vital is a quality standard for UX and web performance set by Google. It can be measured based on real data from users visiting your sites ( field metric ) or in a lab environment ( lab metric ). In fact, several user-centric metrics are used to quantify web vitals. PageSpeed Compare. Large preview ).

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Ten years of page bloat: What have we learned?

Speed Curve

But pages keep getting bigger and more complex year over year – and this increasing size and complexity is not fully mitigated by faster devices and networks, or by our hard-working browsers. How does page bloat affect other metrics, such as Google's Core Web Vitals? Clearly we need to keep talking about it.

Mobile 145
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How to use Server Timing to get backend transparency from your CDN

Speed Curve

However, that pesky 20% on the back end can have a big impact on downstream metrics like First Contentful Paint (FCP), Largest Contentful Paint (LCP), and any other 'loading' metric you can think of. Google recommends that TTFB be 800ms at the 75th percentile. But what happens when it doesn't?

Servers 57
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Google Lighthouse vs Rigor

Rigor

Reading time 11 min As companies become more aware of the importance of web performance, internal teams begin to research tools they can use to use to track their metrics and improve the user experience of their websites and applications. Where Google Lighthouse Shines Bright. Google Lighthouse has a lot going for it.

Google 51
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Web Performance for Product Managers

Speed Curve

What do the different metrics mean? While the focus in most cases tends to be directed toward front-end developers, it's important to remember the back-end as well if you see higher than normal start render times or increases in more basic metrics like time to first byte. What do the different metrics mean? Let's get started.

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Stuff The Internet Says On Scalability For October 19th, 2018

High Scalability

four petabytes : added to Internet Archive per year; 60,000 : patents donated by Microsoft to the Open Invention Network; 30 million : DuckDuckGo daily searches; 5 seconds : Google+ session length; 1 trillion : ARM device goal; $40B : Softbank investment in 5G; 30 : Happy Birthday IRC!; They'll love it and you'll be their hero forever.

Internet 123