To help clearly understand why and how threads can provide a performance benefit, let's perform a few experiments! (the importance of being empirical - experimenting, trying things out - is a critical feature; our Chapter 19, Troubleshooting and Best Practices, covers more on such points). First, we take two simple example programs: one, a program that compares the creation and destruction of processes versus threads, and two, a program that performs matrix multiplication in two ways—one via the traditional single threaded process model, and two, via the multithreaded model.
So, what we are really comparing here is the performance in terms of execution time between using the multiprocess versus multithreaded ...
