What to avoid for performance reasons in multithreaded code?

Question

I\'m currently reviewing/refactoring a multithreaded application which is supposed to be multithreaded in order to be able to use all the available cores and theoretically deliv

Answer 1

What kills performance is when two or more threads share the same resources. This could be an object that both use, or a file that both use, a network both use or a processor that both use. You cannot avoid these dependencies on shared resources but if possible, try to avoid sharing resources.