Go Systems Programming

Buffered channels

Buffered channels allow the Go scheduler to put jobs in the queue quickly in order to be able to serve more requests. Moreover, you can use buffered channels as semaphores in order to limit throughput. The technique works as follows: incoming requests are forwarded to a channel, which processes one request at a time. When the channel is done, it sends a message to the original caller saying that it is ready to process a new request. So, the capacity of the buffer of the channel restricts the number of simultaneous requests it can keep and process: this can be easily implemented using a for loop with a call to time.Sleep() at its end.

Buffered channels will be illustrated in bufChannels.go, which will be presented in four ...