JPEG-XL and AVIF are two of the most advanced modern image formats available today. Both aim to replace older formats like JPEG and PNG by delivering smaller file sizes without sacrificing image quality. Choosing between the two, however, is not straightforward. They were built on different codecs, have different levels of browser support, and perform differently depending on the type of image and use case.

If you care about web performance, Core Web Vitals, and delivering the best possible experience to your visitors, picking the right format matters more than ever. If you want the more practical production comparison first, start with our WebP vs AVIF guide.

Choosing a web performance optimization agency sounds simple until every proposal starts promising the same thing.

“Better PageSpeed scores.”

“Faster loading.”

It has been some years since Early Hints became available but its adoption hasn't been as high as preloading or prerendering.

During a page load, one of the most overlooked sources of wait time is not slow assets or unoptimized images, it is the gap between when the browser makes a request and when it receives enough information to start doing something useful, also known as server response time. If this part of your page load is slow, start with the broader guide on how to reduce server response time.

That is the exact problem Early Hints was designed to fix!

At SpeedVitals, we're committed to making web performance monitoring easy and accessible to all. We're thrilled to announce that we're launching Real-User Monitoring (RUM), which is a significant step forward to help you gain actionable insights from real-world user experiences. You can read more about the product in our RUM public beta announcement.

With this launch, we also had to make changes to our pricing plans to reflect the value and expanded capabilities we provide. These changes will take effect sometime this week and are designed to align the features you get with the impact they deliver for your business. For context on why field performance matters, check the guide on field data.

Today, we are starting a new series on our blog where we will be interviewing Web Performance Enthusiasts and discussing various performance optimization strategies with them.

For the first edition, we have Rishi Raj Jain with us, a Software Engineer who worked as Founding Solutions Engineer at Neon.