In this chapter, we talked about the two main actors in Go concurrency—goroutines and channels. We started by explaining what a thread is, what the differences are between threads and goroutines, and why they are so convenient. Threads are heavy and require a CPU core, while goroutines are lightweight and not bound to a core. We saw how easily a new goroutine can be started by executing a function preceded by the go keyword, and how it is possible to start a series of different goroutines at once. We saw how the arguments of the concurrent functions are evaluated when the goroutine is created and not when it actually starts. We also saw that it is very difficult to keep different goroutines in sync without any additional tools.
Then, we introduced channels that are used to share information between different goroutines and solve the synchronization...
