Slow connection speed with pivpn and wireguard

Hello, When I connect to the home network on dietpi with wireguard am I getting only around 15 mbps. My home network speed is 600mbps. How can I get the speed higher? I know that you are giving some speed away but so much is not acceptable I think.

VPN speed depends on upload speed of your broadband internet connection.

If doing a speedtest, you could watch CPU usage on your device.

Okay, when I’m doing a speedtest the cpu usage goes up to around 25%. My upload speed is also 600mbps from the ISP.