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Performance Testing - Tools, Steps, and Best Practices

KeyCDN

Quantitative performance testing looks at metrics like response time while qualitative testing is concerned with scalability, stability, and interoperability. When the word “performance” is heard, most people immediately think of speed. Many testing tools let you monitor user behavior in great detail.

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An In-Depth Guide To Measuring Core Web Vitals

Smashing Magazine

LCP is supposed to measure loading performance and is a good proxy for all the old metrics we in the performance community used to use (i.e. Time to First Byte (TTFB), DOM Content Loaded, Start Render, Speed Index) — but from the experience of the user. Cumulative Layout Shift (CLS). CrUX LCP dashboard ( Large preview ).

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Front-End Performance Checklist 2021

Smashing Magazine

However, as long as there is no established endorsement of the performance culture, each decision will turn into a battlefield of departments, breaking up the organization into silos. Note : If you use Page Speed Insights or Page Speed Insights API (no, it isn’t deprecated!), Start Render time, Speed Index ).

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

Smashing Magazine

However, as long as there is no established endorsement of the performance culture, each decision will turn into a battlefield of departments, breaking up the organization into silos. Without a strong alignment between dev/design and business/marketing teams, performance isn’t going to sustain long-term. Large preview ).

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

Smashing Magazine

However, as long as there is no established endorsement of the performance culture, each decision will turn into a battlefield of departments, breaking up the organization into silos. Without a strong alignment between dev/design and business/marketing teams, performance isn’t going to sustain long-term. Intended as a RUM metric only.