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

No. You can't continue to gain the new CPU cycles, because they exist on a different core and the core that your single-threaded app exists on is not going to get any faster. A multi-threaded app, on the other hand, will benefit from another core. Well-written parallel code can go up to about 95% faster- on a dual core, which is all the new CPUs in the last five years. That's double that again for a quad core. So while your single-threaded app isn't getting any more cycles than it did five years ago, my quad-threaded app has four times as many and is vastly outstripping yours in terms of response time and performance.