Is there a point to multithreading?

Question

I don’t want to make this subjective...

If I/O and other input/output-related bottlenecks are not of concern, then do we need to write multithreaded code? Theoreti

Answer 1

In the words of Herb Sutter The free lunch is over, i.e. the future performance path for computing will be in terms of more cores not higher clockspeeds. The thing is that adding more cores typically does not scale the performance of software that is not multithreaded, and even then it depends entirely on the correct use of multithreaded programming techniques, hence multithreading is a big deal.

Another obvious reason is maintaining a responsive GUI, when e.g. a click of a button initiates substantial computations, or I/O operations that may take a while, as you point out yourself.