The Performance API offers a way to measure website and app speed. Learn how to use it on actual devices used by real people in different locations.
Core Web Vitals are Google's metrics for evaluating real-world web performance. Learn how to optimize for Core Web Vitals and improve both UX and SEO.
Maria Antonietta Perna highlights the benefits of lazy loading images on websites and shows five approaches to implement lazy loading for your website.
Image optimization affects site performance, and here we cover some standard approaches to image optimization and explore advanced image processing options.
Having a fast site is important for your visitors and search results. How do you achieve that? Adrian Try lists the steps that will make a difference.
Craig Buckler discusses 20 ways to optimize your CSS so that it’s faster-loading, easier to work with and more efficient, covering analysis tools, CDNs, HTTP/2, CSS3, animations and transitions, fonts, concatenation and minifying, build tools, flexbox, grid, SVG, critical CSS, and more.
Tonino Jankov covers the background, performance benefits and current implementations of the HTTP/2 protocol.
Ahmed Boucherfra provides an in-depth guide to making use of the performance-related tools within Firefox's developer tools.
Image Resizing: Bruno Škvorc shows how to modify a multi-image gallery blog to serve resized versions of images depending on the size of the viewport.
Ahmed Bouchefra offers an in-depth exploration of the features of the Chrome DevTools for measuring performance and debugging your web applications.
Bruno Škvorc shows how to implement Varnish as an additional caching layer, along with the Cloudflare CDN, to increase an app's GTMetrix score dramatically.
Zoran Antolović explains what background processing is, why it's important, and how to set it up with Beanstalkd and Supervisor.
Tonino Jankov shows how to use Pingdom, YSlow and GTmetrix to improve performance on an image gallery blog running on Nginx.
Claudio Ribeiro shows how you can use explain and indexes to spot and remedy possible performance issues with your database before they strike.
After setting up and organizing files for a Symfony Flex project, Zoran populates the database with data to test application performance.
Zoran covers the basics of setting up and organizing files for a Symfony Flex project, including tips, tricks and helper scripts to speed up development.
Tonino Jankov introduces techniques to improve Apache and Nginx web server performance, explaining the theory behind those techniques.
Tonino Jankov introduces Cloudflare, a website performance and security service, explaining how it works and how to get started using it.
Tonino lists tools, tips and best practices for optimizing WordPress sites — from hosting options to asset management, caching and software considerations.