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Generally speaking, netcode (or network code) is the part of a source code that deals with all network-related operations. They range from low level stuff (name resolution, packets transmission, ...) to high level systems (client-side prediction in games for instance).Necrosis wrote:What exactly is the definition of "netcode" here? Netcode for games? My dad might know some of this stuff, being a programmer in the communications field, but I'm not sure...
A good netcode is expected to solve in the best possible way the 3 network problems: 1- packet loss (the fact that sometimes a packet you send will never reach its destination), 2- limited bandwidth (the fact that you can only send and receive a limited amount of data per second), and 3- latency (the time a packet needs to travel to its destination machine; note that it's a variable quantity, so a packet may arrive after a packet which was sent AFTER it - no garanteed ordering).
Unless you have a poor network connection with a high packet loss percentage, and/or a very limited bandwidth, what causes the lag in games is the latency, ranging from a dozen of ms (good) to several hundred (bad).