Golang concurrency control

This is a creation in Article, where the information may have evolved or changed. There are two ways of controlling concurrency in Golang: sync. Waitgroup and Channel here are the comparisons between the two methods sync. Waitgroup, the best advantage of this approach is that wait () can block all tasks in the queue before it is unblocked, but its disadvantage is that the number of concurrent threads cannot be specified. Channel Advantages: the ability to use a channel with a buffer to specify the concurrent Goroutine, more flexible. However, its disadvantage is that it is easy to create deadlocks if used improperly, and he also needs to decide whether or not the concurrent goroutine is executed.

However, the channel is more flexible, more convenient to use, and through the time-out processing mechanism can be very good to avoid the channel caused by the program deadlock, so the use of channel to achieve program concurrency, more convenient and easier to use.