Gatsby 5 introduces several cutting-edge features designed to enhance site performance and developer efficiency, building on the success of previous versions. A key innovation is the Slice API, which significantly accelerates Incremental Builds and Deploys by allowing shared components to be built once and reused, reducing build times by up to 90%. Partial Hydration, currently in beta, optimizes React-based sites by loading only necessary JavaScript, improving visitor experience and Google Web Vitals scores. The new Script component facilitates performant script loading, while the Head API offers native SEO support, eliminating the need for third-party libraries. Gatsby 5 also comes with GraphiQL v2, featuring a polished UI and Gatsby-specific code samples, enhancing the development experience. The framework's emphasis on speed is further underscored by advancements in Incremental Builds and Deploys, positioning Gatsby in the realm of Reactive Site Generation. This release is complemented by a straightforward migration guide from Gatsby 4, making the transition seamless for developers.