Performance

Large DOM sizes can be a factor in whether interactions are fast or not. Learn more about the relationship between DOM size and INP, and what you can do to reduce DOM size and other ways to limit rendering work when your page has lots of DOM elements.

Explore is one of the largest recommendation systems on Instagram. We leverage machine learning to make sure people are always seeing content that is the most interesting and relevant to them. Usin…

An overview of time travel debugging and how it relates to debugging your production code execution.

TL;DR: We analyse HTTP requests and SQL queries to find and block excessive and potentially abusive traffic. We look for ...

Meta’s Systematic Code and Asset Removal Framework (SCARF) has a subsystem for identifying and removing dead code. SCARF combines static and dynamic analysis of programs to detect dead code from bo…

This essay explores the connection between Erlang's process supervision, state management and durable execution.

Ship fast and performant UIs, a great start to positive UX.

Technical deep-dive on why you shouldn't have SVGs in your JS bundle and better techniques for JSX usage.

The Chrome User Experience Report (CrUX) provides user experience metrics for how real-world Chrome users experience popular destinations on the web.

Kashyap recalls his journey from design to software to banking and back, learning from side projects, getting into open source, working on Flipkart's PWA, and now diving into RUM.

How two simple steps improved the responsiveness of Wikipedia's mobile site

Or... How I shaved ~33s off my page load by fixing fonts

Discover how we made our browser extension faster. Find out about the technologies and strategies we used to improve performance and provide a smooth browsing experience.

How to grow from one application to an ecosystem of apps and packages.

In this post, we’ll talk about some of the ways we’ve scaled individual Discord servers from tens of thousands of concurrent users to approaching two million concurrent users in the past few years.

Take a closer look at how various performance tools audit and report on performance metrics, such as core web vitals. Geoff Graham answers a set of common questions that pop up during performance audits.

Your app’s networking directly affects the user experience of your app. Imagine having to wait a few seconds for the page to load. Or even worse, imagine waiting for a few seconds every time you perform an action. It would be infuriating! Before you go on a fixing adventure, it’s a good idea to understand what causes that waiting time. So let’s do that!

Learn how the Postman engineering team reduced costs and optimized the performance of the Chronicle system.

CSS content-visibility helps boost rendering performance by controlling whether or not an element renders its contents.

Contribute to Aqua-Nautilus/CVE-Half-Day-Watcher development by creating an account on GitHub.

At monday.com, we rely on Elasticsearch to meet various needs. It supports our clients’ search requirements across account entities, particularly on ...

The article, Analyzing Data 180,000x Faster with Rust, first presents some unoptimized Python code, and then shows the process of rewriting and optimizing the code in Rust, resulting in a 180,000x speed-up. The author notes:

Adventures in hacking Hermes VM’s C++ internals for fun and profit

Fast loading web apps can be a key success factor in terms of user experience. However, improving the performance of a web app is not trivial, since i…

The Internet is the biggest machine ever built – and it has a huge impact on our environment. How can we as perf experts help make IT more sustainable? What would enable us to do more?

Learn about the Speculation Rules API and how CDN Planet used this new browser technology to reduce Time to First Byte on its Cloudflare powered website.

Stripe's continuous integration system is responsible for orchestrating build pipelines and executing tens of thousands of test suites. To meet our exceptionally high security bar, we lean on a combination of open-source tech and novel engineering.