Best way to check proxy for speed and anonymity

If you wanna *really* check proxy anonymity, look for DNS leaks and WebRTC leaks.

Tools like browserleaks.com are great for this.

For speed, I just run a quick curl command to measure response time:
`curl -x [proxy] -o /dev/null -s -w "%{time_total}\n" http://example.com`

Free and no shady sites needed.