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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. That performance golden rule still holds true today.

Servers 57
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Ten years of page bloat: What have we learned?

Speed Curve

How does page bloat affect other metrics, such as Google's Core Web Vitals? And if that already wasn’t enough, the number of images on a page has been linked to lower conversion rates on retail sites. Image size is another issue, as excessive image weight hurts your SEO ranking in Google Image Search.

Mobile 145
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Nines are not enough: meaningful metrics for clouds

The Morning Paper

Nines are not enough: meaningful metrics for clouds Mogul & Wilkes, HotOS’19. The authors of today’s paper should know a thing or two about that: Jeffrey Mogul and John Wilkes at Google 1 ! It’s hard to define good SLOs, especially when outcomes aren’t fully under the control of any single party. The last word.

Metrics 79
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An Opinionated Guide to Performance Budgets

Speed Curve

Web pages are unbelievably complex, and there are hundreds of different metrics available to track. A performance budget is a threshold that you apply to the metrics you care about the most. This is when you run into three important questions: Which metrics should you focus on? Which metrics should you focus on?

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Cumulative Layout Shift: What it measures, when it works (and doesn't), and how to use it

Speed Curve

Back in May, we shared that SpeedCurve supports Google's Core Web Vitals in both our synthetic monitoring and LUX real user monitoring tools. The newcomer to the scene was Cumulative Layout Shift (CLS), and, not surprisingly, it's the metric that's gotten the most questions. recommended by Google. How is it calculated?

Retail 81
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A Complete Guide to Performance Budgets

Speed Curve

A performance budget is a threshold that you apply to the metrics you care about the most. A good performance budget chart, such as the one above, should show you: The metric you're tracking The threshold you've created for that metric When you exceed that threshold How long you stayed out of bounds When you returned to below the threshold 3.

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A simple, client-side approach to measuring Speed Index

Dean Hume

Whilst web page load time is an important metric to measure, it doesn't tell the whole picture. As I started to learn more about web page performance, I started to experiment with webpagetest.org and discovered the different metrics that it uses. The excitement of seeing a web page load in an instant kept me coming back for more.

Speed 40