#!/usr/bin/env sh
set -eu
url="${1:-https://example.com/}"
printf 'HTTP/1.1: '; curl -sS -o /dev/null -w '%{http_version} %{time_total}s
' --http1.1 "$url"
printf 'HTTP/2:   '; curl -sS -o /dev/null -w '%{http_version} %{time_total}s
' --http2 "$url"
printf 'HTTP/3 support depends on how your curl build was compiled; check: curl -V
'