25 documents tagged with “Metrics”
What gets counted in site speed? The leading players are metrics: LCP, INP, CLS as the basis of Core Web Vitals, and alongside them other indicators like TTFB, FCP, TBT, or the Lighthouse Performance Score. Each tells you something different.
Under this tag you will find articles where we break down individual metrics: what they measure, what the thresholds are, and how to read them in PageSpeed.ONE.
Chrome UX Report: Google Users' Speed from A to Z
The Chrome UX Report (CrUX) is a public data set provided by Google that collects and anonymously analyses real user experience data while browsing the web using the Chrome browser.
Cookie Banners and Web Speed
Got your web speed fine-tuned? Excellent, but perhaps you haven't deployed a cookie banner yet.
Core Web Vitals: Everything About Speed Metrics
Core Web Vitals (CWV) is Google's foundational set of metrics designed to reflect website loading speed and user experience. Let’s discover the metrics it includes, why they matter, and how to measure them.
First Contentful Paint (FCP)
First Contentful Paint (FCP) is a metric that measures the time from when a page starts loading to when any part of the page's content is rendered on the screen.
Get Your HEAD Straight
You love WebExpo and you love performance. And we also love Harry Roberts because his talks and articles always go in-depth.
How to Identify the LCP Element
To optimize LCP, it is crucial to identify the "LCP element", which is the largest element in the viewport.
INP Metric: 7 Tips for Optimisation
INP is not the easiest metric to optimise, so we have selected the most common issues and solutions from our experience.
Interaction to Next Paint (INP) Metric: Tackling Slow Interactions
Google introduces the new Interaction to Next Paint (INP) metric, set to replace First Input Delay (FID) in the Core Web Vitals trio by March 2024.
JS Long Tasks (JSLT) Metric: When Your Website Forgets to Breathe
We will explain how the JS Long Tasks metric measures digital gridlocks in the form of long tasks and what these gridlocks can mean for your users and your business.
Largest Contentful Paint (LCP) Metric: A Guide to Faster Page Loads
The world of the Largest Contentful Paint (LCP) metric is akin to the adrenaline-fuelled realm of motor racing – it's a relentless battle against time.
Lighthouse Diff: Comparing Two Website Speed Tests
Lighthouse Diff is a tool for visually comparing two Lighthouse reports. It helps identify exactly what has changed on your website – from overall scores to metrics and individual recommendations.
Lighthouse Performance Score (LPS)
The Lighthouse Performance Score (LPS) is a synthetic metric used to assess website speed and performance, provided by the Lighthouse tool.
Metric “Total Third-Party JavaScript Blocking Time” (3PBT)
The “Total Third-Party JavaScript Blocking Time” metric is an internal indicator from PageSpeed.ONE monitoring, enabling you to focus more on issues caused by third-party components that may degrade your interaction metric (INP).
Optimising CLS Metrics
Let’s explore how to avoid CLS issues and how to fix them if they occur.
Optimising the LCP Metric
Let us explore the challenges you might face with the Largest Contentful Paint (LCP) metric and how to optimise it effectively.
PageSpeed.ONE Score (SPS): How We Determine User Web Speed
Introducing a single figure as a "proxy metric" for Core Web Vitals on both mobile and desktop. We call it the "PageSpeed.ONE Score" (SPS).
PageSpeed.ONE Study: The Impact of Chat Widgets on Website Speed
Live chat is used by twenty percent of Czech e-shop operators. But how do these components affect website speed?
Performance Budgets
Performance budgets are a methodology used to maintain website speed at a predetermined level. Think of a “budget” as a set of limits for different metrics.
Test: Is It Better to Have Many Small CSS Files or One Large One?
At PageSpeed.ONE, we often find ourselves in "evergreen" discussions that divide the team. One eternal question is: Is it faster to have many small CSS files divided by components, or just one large file?
The “Total Blocking Time” (TBT) Metric
Total Blocking Time (TBT) is a web performance metric that indicates the total duration during which a rendered page is unable to respond to user inputs.
The Cumulative Layout Shift (CLS) Metric: How to Identify and Eliminate Unwanted Page Shifts
Fed up with ads that push the text you're reading out of view? Annoyed when content jumps just as you’re about to click, making you click elsewhere?
Time To First Byte (TTFB)
TTFB indicates the speed of the server (or infrastructure), the server-side application, and also the network speed between the server and the user's browser.
Types of Web Speed Measurements: Synthetic, Chrome UX Report, and Real User Monitoring
Let's clarify the differences between various types of web speed measurements. We’ll discuss synthetic data (“synth”), Google user data (“CrUX”), and data from all users (“RUM”).
Web Compression with Gzip and Brotli: Are You Doing It Right?
At PageSpeed.ONE, we often delve into very specific issues. Even so, I am still amazed at the level of detail we explore. The same goes for data compression, which we will examine in this article.
Why Optimise Web Speed?
Psychology, conversions, and Google. Why should you care about a fast website?