What's the best way to check proxies for reliability and speed? or How do you properly check proxies

"What's the best way to check proxies for reliability and speed?"

Hey guys, new here but been messing with proxies for a bit.

I keep seeing people say to *check proxies* before using them, but what’s the *fastest* way to do it? Like, do you just ping them or use some tool?

Also, how do you *check proxies* for speed without wasting hours? Some of mine time out or are slower than my grandma’s dial-up.

Any tips or tools you swear by? Free is cool but don’t mind paying if it’s worth it.

Thanks!