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• C++11 style callbacks instead of C： You can use class member functions or lambda as callbacks.
• TimerandTimerWheel：Heartbeat timeout judgment mechanism with time complexity of O(1).
• Async：Optimized the problem of calling multiple times, perhaps only once, compared to the libuv's async.
• PacketandPacketBuffer：Send and receive packet data, used to resolve TCP stubs/stickers.
• Log interface.

Simple test：one thread 1k bytes ping-pong。
environment：Intel Core i5 6402 + ubuntu14.04.5 + gcc5.5.0 + libuv1.22.0 + O2优化