So far, we have seen multiple ways of creating new threads and sharing information between them. Nevertheless, as we saw at the beginning of the chapter, the ideal number of threads we should spawn to do all the work should be around the number of virtual processors in the system. This means we should not spawn one thread for each chunk of work. Nevertheless, controlling what work each thread does can be complex, since you have to make sure that all threads have work to do at any given point in time.
Here is where thread pooling comes in handy. The Threadpool crate will enable you to iterate over all your work and for each of your small chunks, you can call something similar to a thread::spawn(). The interesting thing is that ...
