How can I check ping before joining a game?

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As an example for dota: CMD> "ping vie.valve.net -t" and it shows my ping to that server.

[James_789]

I don't think it's a supported feature.

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I can play many online games such as DOTA 2, WoW, Diablo 3 without any ping issues, but this one is very laggy (sometimes, not every time).