Why is ConcurrentBag so slow in .Net (4.0)? Am I doing it wrong?

Question

Before I started a project, I wrote a simple test to compare the performance of ConcurrentBag from (System.Collections.Concurrent) relative to locking & lists. I am extr

Answer 1

It appears that ConcurrentBag is just slower than the other concurrent collections.

I think it's an implementation problem- ANTS Profiler shows that it is gets bogged down in a couple of places - including an array copy.

Using concurrent dictionary is thousands of times faster.