Multiple threads and performance on a single CPU

Question

Is here any performance benefit to using multiple threads on a computer with a single CPU that does not having hyperthreading?

Answer 1

Yes, there is a benefit of using multiple threads (or processes) on a single CPU - if one thread is busy waiting for something, others can continue doing useful work.

However this can be offset by the overhead of task switching. You'll have to benchmark and/or profile your application on production grade hardware to find out.