The largest category of difficult-to-anticipate security design weaknesses come from side-channel attacks. In this post, we take a tour of some of the more foundational and out-there side…

QUIC and HTTP/3 have entered the final stages of development at the IETF. Distinguished Engineer, Jana Iyengar, elaborates on the current state of the protocols, their deployment across the…

The Cache-Control response header is one of HTTP’s more widely known header fields; it allows a site to control how caches handle their data in CDNs, browsers, and elsewhere

The HTTP community has been busy modernizing the web’s protocol over the last decade, with multiple revisions of the core specification, a number of extensions, HTTP/2, and now HTTP/…

Network error logging reports client-side failures and successes, enabling developers to understand how their sites function in the real world and how they might improve performance. In this…

In this post we will describe the motivations for a standard WebAssembly cryptography API, the challenges of designing such an API for this programming language, and the work Fastly has…

Understand what Core Web Vitals means and how you can improve some of these metrics with a CDN configuration.

While many of the people building and planning to use QUIC are eager to see wide deployment, there are concerns over whether QUIC can be as computationally efficient as TCP. We ran the tests…

This series on the digital divide examines the data behind several yet-unexplored facets of the issue, the people and places it impacts most greatly, and what can and should be done to close…

HTTP/3 and QUIC aim to help the internet's so-called long-tail connections — connections that are most in need of improvement. What could that look like? For some, it could mean being able…

How is COVID-19 affecting internet performance? We analyzed regional and vertical trends and found that, despite COVID-19-related traffic increases, the internet is up to the challenge.

These crucial pieces of internet architecture — only widely adopted over the last 10 years — are creating the capacity for us to live, work, and learn from home in unprecedented conditions.