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

One thing that decreases performance is having two threads with much hard drive access. The hard drive would jump from providing data for one thread to the other and both threads would wait for the disk all the time.