Early dataTLS 1.3 sessions may be resumed more quickly by sending so-called early data to servers before the TLS handshake has finished. Also known as zero round-trip time resumption or 0-RTT.limitedhttps://httpwg.org/specs/rfc8470.htmlhttps://developer.mozilla.org/docs/Web/HTTP/Reference/Status/425http.headers.Early-Datahttp.status.425https://nowyoucanuse.com/features--early-data.html