What do you know about HTTP/3?

HTTP/3 is the new version of the HTTP protocol, based on the QUIC transport protocol, which operates over UDP instead of TCP. Main advantages of HTTP/3:

• Fast connection setup thanks to 0-RTT and 1-RTT in QUIC.
• Improved performance in packet loss situations, as QUIC implements its own flow control and recovery mechanisms.
• Multiplexing without head-of-line blocking, reducing delays.

Currently, the standard library in Go does not directly support HTTP/3, but there are third-party implementations and experimental packages, such as quic-go, that enable working with HTTP/3.

Example of using quic-go:

import (
    "github.com/lucas-clemente/quic-go/http3"
    "net/http"
)

func main() {
    client := http3.Client{}
    resp, err := client.Get("https://example.com")
    if err != nil {
        panic(err)
    }
    defer resp.Body.Close()
    // handle response
}