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In Defence of DOM­Content­Loaded

CSS Wizardry

Honestly, I started writing this article, for no real reason and somewhat without context, in December 2022—over half a year ago! Technically Meaningful Not all metrics need to be user-centric. This is because some metrics are useful to developers. I bet half of your colleagues don’t either. Or are they…?

Metrics 326
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Implementing service-level objectives to improve software quality

Dynatrace

By implementing service-level objectives, teams can avoid collecting and checking a huge amount of metrics for each service. Instead, they can ensure that services comport with the pre-established benchmarks. This process includes benchmarking realistic SLO targets based on statistical and probabilistic analysis from Dynatrace.

Software 256
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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

How does page bloat affect other metrics, such as Google's Core Web Vitals? A Google machine-learning study I participated in a few years ago found that the total number of page elements was the single greatest predictor of conversions. These numbers should not be taken as a benchmark for your own site. First Input Delay.

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. db = Duration of the request processing spent querying the database.

Servers 57
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Average Page Load Times for 2020 – Are you faster?

MachMetrics

Similar to our article Average Page Load Times for 2018 , we’ll go over the averages for metrics and help you determine if your site is faster or slower than average. By analyzing the data from Backlinko.com and their Page Speed Stats article, we’ll look to answer these questions: What size should be a website be?

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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.