Web Performance improvement for QuintoAndar webapp: LCP, Element Render Delay & Hydration

How to yield to the main thread to improve Interaction-to-Next-Paint (INP) and detailed insights into patterns like await-interaction-response, yieldToMain, yieldUnlessUrgent.

How do you quantify the impact of your web performance changes? Learn how experimentation can support making this easier to measure.

Monitor regressions to interaction performance, down to the line of code.

LoAF lets you identify problem scripts, quantify the impact of third-party scripts, and improve the user experience. Here's everything you need to know to get started.

Turn AI coding assistants into more reliable development partners

Read the latest developments in image quality assessment and encoding, featuring insights from Jon Sneyers.

Arrange a one-day workshop and get hands-on with Core Web Vitals in Safari

Single-page apps came with special performance challenges. Learn how you can gather actionable data on your website performance and fix common SPA performance issues.

How to yield to the main thread to improve Interaction-to-Next-Paint (INP) and detailed insights into patterns like await-interaction-response, yieldToMain, yieldUnlessUrgent.

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A fast paced, animated, and jam packed tik-talk on CSS features from the past ~5 years. CSS has moved so fast, don't…

Exploring progressive image rendering across JPEG, PNG, WebP, AVIF, and JPEG XL.

To celebrate scroll-driven animations finally landing in Safari 26, here are some things you probably want to know before using them. Link to: The anatomy of a scroll driven animation We don’t need the animation-duration property as the animation duration…

Discover the optimal image format for images. I compare JPEG, PNG, WebP, and AVIF in terms of file size, quality, and compression for photos and text images.

The CPU Profiling guide explains how to use Node.js built-in CPU profiling to analyze performance by identifying parts of code that consume the most CPU.

I needed to choose a framework for a mobile-first app at work. I started comparing Next.js, SolidStart, and SvelteKit, then expanded to 10 frameworks. The measurements revealed dramatic differences in bundle sizes, performance, and the real cost of framework…

Understand performance profiles - with the help of AI

Why do fast sites make more money? Because of nobody like a slow website. 14% of your audience will start shopping at another site if your page loads are

T oday’s The Fast and the Curious post explores how Core Web Vitals saved Chrome users more than 10,000 Years of waiting for web pages to lo...

Web Vitals is an initiative by Google to help business owners, marketers and developers alike identify opportunities to improve user exp...

We know that browsers do all sorts of different things under the hood. One of those things is the way they not only *fetch* resources like images and scripts from the server but how they [prioritize those resources](https://www.debugbear.com/blog/request…