Tim Kadlec

MAY 21, 2020

Netlify has a feature called Snippet Injection that lets you inject a snippet of code either just before the closing body tag or just before the closing head tag. Then I toggled the cookie’s value in Chrome’s Dev Tools (under the Application Panel > Cookies) and reloaded. is going to get the other.

Testing 128

Testing Traffic Tuning Metrics 128

MachMetrics

SEPTEMBER 1, 2020

The <picture> tag works in the same way that CSS media queries do. In the above code, the <img> tag is used as the default. Other advantages of <picture> This tag also offers other web performance advantages by giving us an easy way to handle browser compatibility. You can still take advantage of it!

Design 57

Design Media Mobile Website 57

Smashing Magazine

DECEMBER 6, 2021

All popular browsers have an embedded accessible focus by default (you might have seen this bold blue frame around input fields, dropdowns, buttons, and links in Google Chrome). The click area of the primary link ‘wraps’ the auxiliary ones (author’s profile and tags). faded out). Large preview ). Large preview ). Now, emails.

Website 141

Website Design Internet Internet 141

Smashing Magazine

OCTOBER 18, 2021

So we decided to use Web Vitals Google Chrome extension since it can record CLS on a page while the user is interacting with it. observe({type: 'layout-shift', buffered: true}); On further investigation, we found that ASDA faced a similar kind of issue and raised it for chrome. Root Cause.

Website 105

Website Google Metrics Testing Tools 105

CSS - Tricks

AUGUST 19, 2019

That'd be 14 extra <link> tags in the first few packets of data on every request on this site. Each test consisted of nine runs, using Chrome emulating a mobile device, and the Cable network profile. A quick look at CSS-Tricks resources right now, I get: secure.gravatar.com static.codepen.io

Network 52

Network Performance Best Practices Internet 52

Smashing Magazine

APRIL 17, 2019

The first of these is prefetching, and its link tag might look like this: <link rel="prefetch" href="[link] as="document"> This tells the browser that it can go ahead and fetch a page in the background so that it’s ready to go when requested. This might limit its usefulness unless you happen to be specifically targeting Chrome.

Performance 106

Performance Games Servers Cache 106

Speed Curve

APRIL 3, 2022

Last Painted Hero – When the last piece of critical content (largest image, largest background image and/or first H1 tag) is painted in the browser. Tested once per day on a Chrome desktop browser with a fast connection (25Mbps/10Mbps 10ms RTT). Tested on our private agents in Frankfurt (EU), US East Coast (US), and Japan.

Benchmarking 54

Benchmarking Speed Retail Media 54

MachMetrics

SEPTEMBER 22, 2020

Chrome DevTools has an awesome Coverage tool that allows you to see what percentage of various files are being called. Target seems to load an <img> tag as well as a <div> with the product image set as the background. Fix #2 Break Up Javascript Files to Better Use HTTP/2.

Retail 82

Retail Speed Website Google 82

Speed Curve

DECEMBER 19, 2018

What we see is that the HTML parser stops when it encounters a SCRIPT tag until that script is downloaded, parsed, and executed. Because the HTML parser stopped, all network traffic also stopped (because no other HTML tags were parsed to initiate HTTP requests). The solution to these problems is to load scripts asynchronously.

Internet 53

Internet Internet Website Traffic 53

Dynatrace

APRIL 23, 2019

Dynatrace looks at meta data like technology type (Java,NET, PHP, …), the platform (Tomcat, Kubernetes, OpenShift, …), container details (image, tags, …) as well as class names, service names, … in order to come up with a meaningful name to display to the user. Pro Tip #3: Emojis are supported. Conclusion: Humans can benefit from AI.

Artificial Intelligence 111

Artificial Intelligence Mobile Java Processing 111

Tim Kadlec

NOVEMBER 6, 2013

One of the recommendations made was to kill the double-tap gesture on Chrome and Firefox for Android. To do this, you have to kill scaling: On Chrome Android and Firefox this involves using the “viewport” meta tag to disable zooming (with user-scalable=no or initial-scale=1,maximum-scale=1).

Scalability 40

Scalability Google Mobile Performance 40

Speed Curve

FEBRUARY 15, 2021

LCP is only available in Chrome, so if you have a significant number of users that come in via other browsers, you should consider tracking Last Painted Hero, below. > This is great if you want to focus on performance for Chrome users or you're (rightfully) concerned about SEO for Google. > Last Painted Hero (Synthetic).

Performance 134

Performance Metrics Benchmarking Google 134

Speed Curve

APRIL 3, 2018

Since these pages often use custom fonts, measuring largest text (within the first h1 tag on the page) is a good way to track how fonts affect rendering. While at #PerfMatters Conference last week I bumped into Harald Kirschner (Mozilla) and Paul Irish (Chrome) who were talking about Hero Rendering Times as a standard metric.

Metrics 56

Metrics Website Speed Media 56

Tim Kadlec

APRIL 10, 2012

Test One: Image Tag. Chrome (4.1)+. Chrome Mobile. Chrome (16+). Chrome Mobile. Chrome (16+). Chrome Mobile. Chrome (16+). Chrome Mobile. Chrome (16+). Chrome Mobile. First, any credit has to go to the awesome team at Cloud Four. On to the results! Run the test.

Media 75

Media Mobile Testing Internet 75

KeyCDN

SEPTEMBER 20, 2018

Unfortunately, Marker is currently only available as an extension for Chrome, but the developers are working on further integration for WordPress. DebugMe The DebugMe extension is compatible with most web browsers including Chrome, Safari, Internet Explorer, Microsoft Edge and Opera.

Strategy 67

Strategy Monitoring Website Google 67

Tim Kadlec

OCTOBER 16, 2012

Here’s the wrinkle: when snapped, IE10 ignores the meta viewport tag for any viewport smaller than 400 pixels in width (which it is, when in snap mode). Early versions of Chrome and Firefox are both available for Metro and using the typical meta viewport element is enough to ensure layouts adjust while in snap mode.

Design 75

Design Media Internet Internet 75

Speed Curve

FEBRUARY 25, 2024

In this post I'm going to walk through: How I help people identify the causes of poor INP times Examples of some of the most common issues Approaches I've used to help sites improve their INP Identifying Interactions The Chrome UX Report (CrUX) can provide a high-level view of INP. Opening a guest profile in Chrome 2.

Analytics 92

Analytics Processing Google Mobile 92

Smashing Magazine

OCTOBER 6, 2021

Chrome, Edge, Firefox, and Safari also have a way to track the changes you’ve made and save them to make it easier for you to copy over any updates. Chrome/Edge. Within a fixed layout set to 100vh , the bottom part of the website content is stuck behind the browser chrome, making it inaccessible when scrolling is prevented.

Design 145

Design Availability Mobile Website 145

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. The below screenshot shows the performance calculations performed by Chrome on a site I work on which has a gallery of about 100 images. Rollout To Other Browsers.

Website 125

Website Code Mobile Network 125

Smashing Magazine

OCTOBER 28, 2021

Cheerio allows us to select tags of an HTML document by using selectors: $("div"). We will use the developer tools in Chrome, but you can use any web browser you’re comfortable with. — the magical Node library that provides a high-level API to control a Chrome instance over the DevTools Protocol. Large preview ).

Website 115

Website Code Retail Best Practices 115

Dynatrace

DECEMBER 18, 2020

The app is structured as a Chrome Extension. Chrome Extensions run JavaScript in a separate context, essentially in an “isolated world” This means that JS running in the Extension context can’t see or change JS variables running in the webpage context and vice versa. Think of things like heatmaps, Sankey charts, etc.

Analytics 136

Analytics Metrics IoT Monitoring 136

Alex Russell

APRIL 29, 2021

Conversely, the much lower Chrome and Firefox lines indicate that Blink and Gecko are much more likely to both agree and be correct regarding implementations of core web standards [6]. The data is challenging to compare across those graphs, so I extracted it to produce a single chart : Chrome. Where Chrome Has Lagged.

Media 145

Media Games Education Engineering 145

Speed Curve

MAY 1, 2023

Your site has a number of people contributing content, such as unoptimized images and third-party tags that have the potential to seriously hurt the speed of your pages. This can be especially handy if you have a lot of third-party tags on your pages, as third parties can be a heavy contributor to excessive Long Tasks time. >

Performance 98

Performance Metrics Media Google 98

KeyCDN

JANUARY 16, 2019

Client hints were introduced by Google for Chrome, and other browsers have adopted (or in the process of adopting) them since the HTTP specification was released. Client Hints Browser Support Client hints work wonders for Chrome and Opera users, but they can potentially create problems for visitors who have unsupported browsers.

Servers 67

Servers Google Website Energy 67

Smashing Magazine

MAY 6, 2019

According to the native lazy loading specification (still under development), if you want to lazy load images or iframes using the native lazy loading feature, you would just need to add the loading=lazy attribute on the related tag. <img The same attribute can be applied to iframes. A Little Third-Party Help. The script is only 2.0

Website 103

Website Best Practices Media Open Source 103

Speed Curve

JANUARY 7, 2020

In his talk Deep Dive into Third-Party Performance , Simon Hearne covered which third-party tags have the greatest impact on user experience, how ad blockers affect site speed, and what to look out for when evaluating a new third-party service. Here's how you can use SpeedCurve to set performance budgets and alerts.

Performance 85

Performance Best Practices Metrics Monitoring 85

Alex Russell

DECEMBER 22, 2018

TL;DR: Having achieved much of what I hoped when running for the TAG six years ago, it’s time for fresh perspectives. For the past 6 years, I’ve served as a member of the W3C’s Technical Architecture Group (or “TAG” for short). Improving the layering and overall quality of client-side APIs.

Logistics 40

Logistics Google Government Design 40

Smashing Magazine

JUNE 1, 2022

The most popular, by far, is the Google Lighthouse report (available in Chrome Developer Tools) and Google’s Page Speed Insights. In a multivariate test, you serve a version of the page with the third-party tag on it to one segment of your visitor population, and the other segment gets a version of the page without the third-party tag.

Website 131

Website Design Network Best Practices 131

Smashing Magazine

JULY 29, 2019

I launched Chrome and opened the dev tools, where I throttled the network to a slow 3G connection. This is also the header set by Chrome for Android’s ‘Lite mode’, which I’ll cover in more detail later. I enabled Chrome. Chrome devtools screenshot of the DOM, where I’ve expanded one inline style tag.

Cache 96

Cache Google Mobile Network 96

CSS - Tricks

JUNE 1, 2021

We first check that <p> tag is empty. And lastly, we check that the <p> tag contains “Hello human!” For example, Chrome already has one tool built right into its DevTools. We open Lighthouse in Chrome DevTools, click the “Accessibility” test option, and “Generate” the report.

Testing 95

Testing Performance Testing Website Code 95

Randon ASCII

AUGUST 16, 2018

I work at Google, making Chrome, for Windows, focused on performance. And after a lot of false starts and some hard work I figured out how Chrome, gmail, Windows, and our IT department were working together to prevent me from typing an email, and in the process I found a way to save a significant amount of memory for some web pages in Chrome.

Programming 75

Programming Virtualization Code Processing 75

CSS - Tricks

APRIL 1, 2021

The most common critical resources are: A <script> tag that is in the <head> and doesn’t contain an async , or defer , or module attribute. The <async> tag is what allows the browser to download the JavaScript asset asynchronously.

Cache 92

Cache Social Media Media Website 92

The Morning Paper

JULY 11, 2019

Right-clicking on an HTML tag in the browser opens up a context menu with a list of suggested refactorings for that element. The application is also instrumented to ensure every HTML tag has an unique id if it didn’t originally. The cost of an HTML tag is then set as the cost of the most expensive query that contributes to it.

Database 47

Database Performance Speed Servers 47

Testsigma

JUNE 19, 2020

Chrome, Firefox, Safari etc. Selenium supports execution on multi browsers like Chrome, Firefox etc. All the plugins which are present in pom.xml stored in a central maven repository and it is present in the <dependency> tag. Go to the tab “Using Testsigma Chrome extension” 3. Java, Python, etc ). Selenium 3.

Testing Tools 60

Testing Tools Testing Open Source Java 60

Smashing Magazine

JULY 16, 2019

We use CSS to find the tag which carries the title text, and then we extract it. In this example, I am using Chrome DevTools. Just right-click on any movie title and select ‘inspect’: Chrome DevTools window. Again, all these selectors were found using Chrome DevTools as demonstrated before and then tested with the Scrapy shell.

Scalability 87

Scalability Website C++ Servers 87

Smashing Magazine

MAY 5, 2021

This data collection is being made available by inserting the JSON inside a script tag with id __NEXT_DATA__. The big JSON is embedded inside a script tag with id of NEXT_DATA : <script id="__NEXT_DATA__" type="application/json"> // Huge JSON here. </script> that metric is called “content download” in Chrome Dev Tools.

Google 110

Google Architecture Servers Speed 110

Rigor

SEPTEMBER 3, 2019

Chrome Developer tools. STEP 8: Review Third-Party Tags and Domains. Third-party vendors and tags can have a bigger impact on your performance and user experience than you think. Rigor’s free performance report. Similarly, make a plan to disable A/B testing and similar initiatives during peak load times wherever possible.

Website 74

Website Cache Ecommerce Traffic 74