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Why Use Threads?

Explore why using threads enhances program performance by enabling parallel processing on multiple CPUs and avoiding blocking during slow I/O operations. Learn how threads help share data efficiently within a single address space and improve responsiveness in multi-threaded applications.

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Before getting into the details of threads and some of the problems you might have in writing multi-threaded programs, let’s first answer a more simple question. Why should you use threads at all?

Threads
Threads

As it turns out, there are at least two major reasons you should use threads.

Parallelism

The first is simple: parallelism. Imagine you are writing a program that performs operations on very large arrays, for example, adding two large arrays together, or incrementing the value of each ...