I would like to benchmark my ISP's service for UDP, which is what OpenVPN uses. Is there a free OpenVPN public server that I can try just for a few minutes to find out how fast my ISP is with UDP packets? That server's performance has to be much faster than what my ISP offers, which is 30 Mbps.
Maybe you can find a public QUIC server. QUIC uses UDP for rapid data transfer. See https://www.chromium.org/quic/playing-with-quic for code. Or you could setup your own server on a VPS with 100 Mbps or even 1 Gbps uplink.