Early Hints (HTTP 103)

Early Hints (HTTP 103 response status) is a mechanism that allows the server to send resource hints to the browser before the final HTML response is ready. For example, the server can send Early Hints to preload critical CSS, fonts, or images while it's still generating the HTML. This is particularly useful for optimizing sites that generate HTML dynamically and can provide significant performance improvements by allowing the browser to start preloading resources earlier.