Asynchronous programming model
The third model is what interests us the most. In this model, tasks are interleaved in a single thread of control. Consider the following figure:
The asynchronous model is simpler because you have only one thread. When you are executing one task, you are sure that only that task is being executed. This model doesn't require complex mechanism for inter-thread coordination and, hence, is more predictable. There is one more difference between the threaded and the asynchronous models; in the threaded model, you don't have a way to control the thread execution as the thread scheduling is mostly done by the operating system. However, in the asynchronous model, there is no such challenge.
In which scenarios can the asynchronous model outperform the synchronous model? If we are simply splitting tasks into smaller chunks, intuitively, even the smaller chunks will take quite an amount of time when you add them up in the end.
There is a significant factor we...
