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Average Page Load Time in 2021

MachMetrics

Many people often confuse site speed with page speed grades of performance testing tools, which are actually calculated based on multiple factors of a page including its loading speed. Test your pages. Start by testing your page on a speed testing tool such as Google Page Speed Insight , webpagetest.org , GT Metrix , etc.

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The State Of Mobile And Why Mobile Web Testing Matters

Smashing Magazine

After all, when we look at our analytics, we will hardly find any customers browsing our sites or apps with a mid-range device on a flaky 3G connection. While a vast majority of the time is spent in just a few mobile apps, social media platforms provide a gateway to the web and your services — especially in education.

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Why is Wordpress Slow?

KeyCDN

Several website speed testing tools available could be used for this purpose. KeyCDN Website Speed Test, GTmetrix, Google PageSpeed Insights, WebPageTest, and Pingdom Tools are some great choices. We test the home page of a WordPress website using the Website Speed Test.

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10 Steps to Prepare Your Website for High-Load Days: Are You Ready for Black Friday?

Rigor

At a minimum, Optimal recommends that you have RUM, APM, synthetic, and load test tools set up, instrumented, and producing meaningful data. RUM or analytics data (funnel analysis) can help you determine the user flows that drive the majority of your business and that will be most critical on high-load days.

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Front-End Performance Checklist 2021

Smashing Magazine

This guide has been kindly supported by our friends at LogRocket , a service that combines frontend performance monitoring , session replay, and product analytics to help you build better customer experiences. Assets Optimizations Brotli, AVIF, WebP, responsive images, AV1, adaptive media loding, video compression, web fonts, Google fonts.

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Front-End Performance Checklist 2020 [PDF, Apple Pages, MS Word]

Smashing Magazine

Is it worth exploring tree-shaking, scope hoisting, code-splitting, and all the fancy loading patterns with intersection observer, server push, clients hints, HTTP/2, service workers and — oh my — edge workers? You can then mimic the 90th percentile’s experience for testing. thanks, Guy Podjarny!

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Front-End Performance Checklist 2019 [PDF, Apple Pages, MS Word]

Smashing Magazine

Is it worth exploring tree-shaking, scope hoisting, code-splitting, and all the fancy loading patterns with intersection observer, server push, clients hints, HTTP/2, service workers and — oh my — edge workers? To get accurate results and goals though, first study your analytics to see what your users are on.