Hands-On High Performance with Go

Channels – a typed conduit

Channels provide a model to send and receive data between goroutines, whilst skipping past synchronization primitives provided by the underlying platform. With properly thought-out goroutines and channels, we can achieve high performance. Channels can be both buffered and unbuffered, so the developer can pass a dynamic amount of data through an open channel until the value has been received by the receiver, at which time the channel is unblocked by the sender. If the channel is buffered, the sender blocks for the given size of the buffer. Once the buffer has been filled, the sender will unblock the channel. Lastly, the close() function can be invoked to indicate that the channel will not receive any more values. ...