Smashing Magazine

FEBRUARY 27, 2024

If you haven’t heard, INP is replacing the First Input Delay (FID) metric, something you can read all about here on Smashing Magazine as a guide to prepare for the change. We can use it to report the load time of elements on the page, even going so far as to report on Core Web Vitals metrics in real time.

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Performance Metrics Monitoring Google 115

Smashing Magazine

APRIL 19, 2021

Google has announced that from 1st May, they will start to consider “Page Experience” as part of Search ranking , as measured by a set of metrics called Core Web Vitals. The Core Web Vitals are a set of three metrics designed to measure the “core” experience of whether a website feels fast or slow to the users, and so gives a good experience.

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Google Metrics Mobile Analytics 143

Smashing Magazine

MARCH 2, 2021

The gotcha here is that, if your mobile experience isn’t optimized for various devices and network conditions, these customers will never appear in your analytics — just because your website or app will be barely usable on their devices, and so they are unlikely to return. Driving Business Metrics. LT Browser in action.

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Mobile Testing Website Benchmarking 142

Smashing Magazine

MARCH 6, 2025

The Four LCP Subparts LCP subparts split the Largest Contentful Paint metric into four different components: Time to First Byte (TTFB) : How quickly the server responds to the document request. Expand the Largest Contentful Paint metric to see subparts and other details related to your LCP score. Its not (yet?)

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Website Google Speed Metrics 59

Smashing Magazine

AUGUST 10, 2023

In fact, there’s great tooling right under the hood of most browsers in DevTools that can do many things that a tried-and-true service like WebPageTest offers, complete with recommendations for improving specific metrics. Certain tools are designed for certain metrics with certain assumptions that produce certain results.

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Speed Monitoring Testing Network 85

Smashing Magazine

NOVEMBER 22, 2021

While mobile devices have come a long way in terms of network and CPU speed, many of them are still significantly underpowered when compared to desktops, especially in countries where mobile connectivity is still poor. Better tooling and metrics standardization. In other words, the field lacked standardization.

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Website Performance Google Website Performance 141

Smashing Magazine

APRIL 16, 2024

There are three web vitals metrics Google uses to measure different aspects of website performance: Largest Contentful Paint (LCP), Cumulative Layout Shift (CLS), Interaction to Next Paint (INP). Large preview ) Largest Contentful Paint (LCP) The Largest Contentful Paint metric is the closest thing to a traditional load time measurement.

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Google Monitoring Website Speed 124

Smashing Magazine

OCTOBER 24, 2023

Total Blocking Time One thing I know would be more helpful than a set of Core Web Vitals scores from Lighthouse is knowing the time it takes to go from the First Contentful Paint (FCP) to the Time to Interactive (TTI), a metric known as the Total Blocking Time (TBT). You can see that Lighthouse does indeed provide that metric.

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Google Analytics Traffic Metrics 110

Smashing Magazine

NOVEMBER 17, 2022

Webpage performance test report for the Smashing Magazine website. Images are crucial elements for performance and UX, and data extracted from Core Web Vitals metrics such as Largest Contentful Paint , which attempts to identify the most important piece of the above-the-fold content on a given page, proves this. Large preview ).

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Media Cache Website Mobile 125

Smashing Magazine

JANUARY 15, 2019

The key metric for measuring the sustainability of a digital product is its energy usage. This includes the work done by the server, the client and the intermediary communications networks that transmit data between the two. An obvious metric here is CPU usage, but memory usage and other forms of data storage also play their part.

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Website Performance Website Energy Performance 78

Smashing Magazine

MAY 16, 2022

This header can be set on the response of any network resource, such as XHR, fetch, images, HTML, stylesheets, etc. The header is constructed via a name with an optional description and/or metric value. These subtypes are currently the only subtypes related to network requests and thus exposing the Server-Timing information.

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Servers Monitoring Cache Network 111

Smashing Magazine

JUNE 10, 2021

Waterfaller: A Tool Focusing On Network Waterfalls. Contrary to Lighthouse or WebPage Test, Waterfaller focuses on one thing alone — issues in the network waterfall. Waterfaller focuses on issues in the network waterfall and provides recommendations for improvement. I discovered Waterfaller just recently.

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Website Cache Best Practices Network 109

Smashing Magazine

AUGUST 9, 2021

It also, however, takes a full network round trip to complete before anything else can be done on a connection. Finally, QUIC also uses so-called flow-control and congestion-control mechanisms that prevent a sender from overloading the network or the receiver, but that also make TCP slower than what you could do with raw UDP.

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Transportation Internet Internet Network 145

Smashing Magazine

MAY 17, 2021

There are three Core Web Vitals metrics that Google will use to help rank sites in their upcoming search algorithm update. Chrome is set up to track these metrics across all logged-in Chrome users, and sends anonymous statistics summarizing a customer’s experience on a site back to Google for evaluation. Large preview ).

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Google Analytics Serverless Metrics 111

Smashing Magazine

MAY 5, 2021

Meet “ Web Vitals ”, but in particular, meet LCP (Largest Contentful Paint): “Largest Contentful Paint (LCP) is an important, user-centric metric for measuring perceived load speed because it marks the point in the page load timeline when the page’s main content has likely loaded — a fast LCP helps reassure the user that the page is useful.”.

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Google Architecture Servers Speed 113

Smashing Magazine

AUGUST 15, 2023

Large preview ) While browsers are generally pretty fast, these steps still take time to load, typically in seconds, and even longer on slower, high-latency network connections. So noticeable, in fact, that Core Web Vitals has a metric all about it called Largest Contentful Paint (LCP). Let’s use that instead of a standard JPG.

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Media Metrics Mobile Best Practices 77

Rigor

JUNE 12, 2019

When talking to an executive, she explains, you have to bear in mind that they may not understand the language of performance metrics. You need to find your 'Rosetta Stone' to translate the language of performance metrics for others in your organization. I used my expertise to educate people about metrics,” says Gringaus.

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Performance Social Media Internet Internet 72

Smashing Magazine

OCTOBER 29, 2018

Studying your network waterfall chart in developer tools will show this delay up under the category of “Waiting (TTFB)”. If we look at the request in the Network section of Developer Tools, we can see that the timings have been added to the chart. Each metric can specify three possible properties. Implementing Server Timing.

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Servers Performance Metrics Database 89

Smashing Magazine

JUNE 1, 2022

In this case, we are not going to be talking about infrastructure services, such as a cloud computing platform like Microsoft Azure or a content distribution network like Akamai. And JavaScript can certainly make requests for additional network resources. Sometimes, the visitor’s browser itself can be the origin of network activity.

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Website Design Network Testing 138

Smashing Magazine

OCTOBER 18, 2021

Performance is one of the core aspects to ensure our users are having a delightful user experience irrespective of their devices or network connection. We found out user-centric performance metrics to be the perfect fit for this purpose. For this case study, we are mainly going to focus on CLS.

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Website Google Metrics Testing Tools 120

Smashing Magazine

AUGUST 3, 2023

Google’s Core Web Vitals is a set of performance metrics that site owners can use to evaluate performance and diagnose performance issues. These metrics provide a different perspective on user experience: Largest Contentful Paint (LCP) Measures the time it takes for the main content on a webpage to load. One of the key Next.js

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Performance Cache Traffic Metrics 78

Smashing Magazine

JANUARY 16, 2023

Largest Contentful Paint (or LCP) is one of three metrics of the Core Web Vitals. These metrics are used by Google to evaluate the quality of user experience. The images used in the article’s Codepen demonstrations will be integrated with TwicPics to save time in their creation and speed up the optimization of the LCP metric.

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Media Mobile Website Metrics 120

Smashing Magazine

SEPTEMBER 6, 2021

Next, we’ll look at how to set up servers and clients (that’s the hard part unless you’re using a content delivery network (CDN)). Using just a few (but still more than one), however, could nicely balance congestion growth with better performance, especially on high-speed networks. Servers and Networks. Network Configuration.

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Network Servers Cache Traffic 120

Smashing Magazine

MAY 9, 2022

A disk cache is faster than having to fetch those resources from the network (though not always, oddly enough !), Manual testing may also show this, especially if you can slow down your network, but that is a little subjective, so can be prone to false positives and false negatives. The HTTP Cache is a disk cache.

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Cache Games Performance Website 106

Smashing Magazine

APRIL 29, 2022

Performance needs to be built in starting at the code level, and user-centric metrics like time to interactive (TTI), total blocking time (TBT), and first input delay (FID) help you gauge how fast a website is. This is why performance is crucial when building websites. The JavaScript Tax.

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Website Google Open Source Mobile 98

Smashing Magazine

JULY 29, 2019

Failing that, we are usually able to connect to home or public WiFi networks that are on fast broadband connections and have effectively unlimited data. The speed of mobile networks, too, varies considerably between countries. As for mobile network connection type, 84.7% For reference, the metric is $1.19 Mbps upload.

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Cache Mobile Google Network 99

Smashing Magazine

FEBRUARY 2, 2022

This problem is more apparent on unreliable and slow networks and lower-end devices. Users can browse the Internet using slow and unreliable networks, so minification, optimization, and code-splitting of JavaScript files ensure that the user downloads the smallest file possible. Large preview ). Large preview ).

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Code Performance Network Website 104

Smashing Magazine

MARCH 6, 2025

The Four LCP Subparts LCP subparts split the Largest Contentful Paint metric into four different components: Time to First Byte (TTFB) : How quickly the server responds to the document request. Expand the Largest Contentful Paint metric to see subparts and other details related to your LCP score. Its not (yet?)

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Website Google Speed Metrics 62

Smashing Magazine

MARCH 9, 2020

This avoids a layout shift as the image is downloaded — something Chrome has recently started measuring in the new Cumulative Layout Shift metric. As you can see, the impact is considerable — especially on lower-end devices and slow network speed, where images are coming in separately. Large preview ).

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Website Code Mobile Availability 129

Tim Kadlec

SEPTEMBER 30, 2015

Improved performance metrics have shifted the discussion to more experience-based optimizations such as optimizing for the critical path. My first few sites were simple (and ugly) things I put together using Notepad and an FTP client while teaching myself HTML using a little magazine I bought. We have the shift to ECMAScript 6.

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Technology Technology Latency Design 53

Smashing Magazine

OCTOBER 6, 2021

A more recent hot topic in site performance and related metrics is Cumulative Layout Shift (CLS). In the example video from my own site that has this problem, I’ve used the Network Conditions panel in Edge to load the site with “Network throttling” set to “Slow 3G.” Cumulative Layout Shift.

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Design Availability Mobile Website 145

Smashing Magazine

OCTOBER 9, 2023

FCP is a metric that measures the time between the point when a page starts loading to when the first bytes of content are rendered. These components take advantage of the plugin’s features and use the <picture> HTML element to ensure the most appropriate image is served to each user based on their device and network conditions.

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Media Network Code Processing 95

Smashing Magazine

OCTOBER 20, 2021

dev server running at: > Local: [link] > Network: use `--host` to expose ready in Xms. As long as the user has something to view before your JavaScript is done parsing, you’ll get a decent score on those lighthouse metrics. So if we renamed index.html to about.html , we would visit [link] (yes, you’ll need a trailing slash!).

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Website Servers Code Programming 111

Smashing Magazine

NOVEMBER 2, 2021

Moreover, Garten-und-Freizeit, a German e-commerce store that sells furniture, saw an amazing improvement in their metrics after getting a PWA. The method with data pulled from the network prior to cache is considered a good option. The Rooted Objects brand saw 162% conversion growth, what a tangible boost! Large preview ).

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Code Cache Mobile Retail 90

Smashing Magazine

JUNE 2, 2021

Many of them are covered in CSS-Tricks’ helpful overview , and Smashing Magazine offers a great PDF checklist. Several metrics centre on the time after which users can interact with the page. The waterfall of network activity helped a lot here, but so did thinking of user flows. First Things First: Things Loaded On All Pages.

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Performance Cache Website Mobile 132

Smashing Magazine

JUNE 2, 2021

Looking briefly at the other two Core Web Vitals, Largest Contentful Paint (LCP) does exactly as its name suggests and is more of a twist on previous loading metrics that measures how quickly the page loads. That’s not to say solving issues with these two metrics are easy, but they are reasonably well-understood problems.

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Media Metrics Website Google 130

Smashing Magazine

AUGUST 9, 2022

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. While most of the tools covered below only rely on field metrics, others use a mix of both field and lab metrics.

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Performance Benchmarking Website Metrics 134