19. Introducing Multithreading

Two significant trends of the past decade have had an enormous effect on the field of software development. First, the continued decrease in the cost of performing computations is no longer driven by increases in clock speed and transistor density, as illustrated by Figure 19.1. Rather, the cost of computation is now falling because it has become economical to make hardware containing multiple CPUs.

A scatter plot depicts the increase in the speed of the Microprocessor from the year 1970 to 2020.

Figure 19.1: Clock speeds over time

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