What is Parallelism?

Parallelism is a paradigm that helps to utilize the hardware’s power completely. Let’s understand parallelism in depth. Assume we have a four-core hardware, and we have to do N number of tasks. If we multiplex all the tasks to the same core, we won’t be completely utilizing the hardware because the other three cores will be sitting idle.

The main idea behind parallelism is that we can simultaneously perform multiple tasks in different cores. Thus, if we have to perform N tasks and we have four cores, by using parallelism, we can have four tasks executing simultaneously at any one time.