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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. Latency – How much time does it take to deliver a packet from A to B. Also measured by round trip time (RTT).

Servers 57
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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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Fixing a slow site iteratively

CSS - Tricks

Site performance is potentially the most important metric. Google’s industry benchmarks from 2018 also provide a striking breakdown of how each second of loading affects bounce rates. Having a slow site might leave you on page 452 of search results, regardless of any other metric. Source: Google /SOASTA Research, 2018.

Cache 92
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The Performance Inequality Gap, 2021

Alex Russell

The scale of the effect can be deeply situational or hard to suss out without solid metrics. Since then, the metrics conversation has moved forward significantly, culminating in Core Web Vitals , reported via the Chrome User Experience Report to reflect the real-world experiences of users. Today, either method returns a similar answer.

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Can You Afford It?: Real-world Web Performance Budgets

Alex Russell

Budgets are scaled to a benchmark network & device. This helps support executive sponsors who then have meaningful metrics to point to in justifying the investments being made. Very rarely have we seen a team succeed that doesn’t set budgets, gather RUM metrics, and carry representative customer devices.

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SQL Server I/O Basics Chapter #1

SQL Server According to Bob

Many high-end disk subsystems provide high-speed cache facilities to reduce the latency of read and write operations. Microsoft strongly recommends maintaining the default recovery interval to ensure optimal recovery metrics and to function cleanly within the current cluster resource constraints.

Servers 40
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Front-End Performance Checklist 2021

Smashing Magazine

LogRocket tracks key metrics, incl. Getting Ready: Planning And Metrics Performance culture, Core Web Vitals, performance profiles, CrUX, Lighthouse, FID, TTI, CLS, devices. Getting Ready: Planning And Metrics. DOM complete, time to first byte, first input delay, client CPU and memory usage. Get a free trial of LogRocket today.