LearnBoost/socket.io — pull request #771 by felixge (2012-02-29 13:20:09+00:00)
Title: Make heartbeat timeout > heartbeat interval

Otherwise clients would detect timeouts before a heartbeat has a chance
of reaching them. The new values themselves were suggested by @rauchg. I
myself think that the heartbeat timeout should probably only be ~10s larger
than the interval.

Only makes sense along with: https://github.com/LearnBoost/socket.io-client/pull/394