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GameNetworkingSockets is a basic transport layer for games. A reliability layer significantly more sophisticated than a basic TCP-style sliding window. It is based on the "ack vector" model from DCCP (RFC 4340, section 11.4) and Google QUIC and discussed in the context of games by Glenn Fiedler. The basic idea is for the receiver to efficiently communicate to the sender the status of every packet number (whether or not a packet was received with that number). By remembering which segments...
A cross-platform network component developed by WeChat
...Mars has been proven effective by billions of WeChat users. It supports Android, iOS/macOS and Windows platforms, and is very mobile platform friendly due to its minimal power and traffic consumption.