“When properly designed, multithreaded programs can improve throughput by utilizing available processor resources more effectively. Using multiple threads can also help achieve better throughput on singleprocessor systems. If a program is single-threaded, the processor remains idle while it waits for a synchronous I/O operation to complete. In a multithreaded program, another thread can still run while the first thread is waiting for the I/O to complete, allowing the application to still make progress during the blocking I/O. (This is like reading the newspaper while waiting for the water to boil, rather than waiting for the water to boil before starting to read.) 1.2.2.”