This article explains how BuildKit works in depth, why it's faster than Docker's previous build engine, and what it looks like under the hood. BuildKit is Docker's new default build engine as of Docker Engine v23.0. Despite BuildKit being used by millions of developers, the documentation out there is relatively sparse. This has led to it being seen as a bit of a black box. At Depot, we've been working with (and reverse engineering) BuildKit for years and have developed a deep understanding of it...