Using 'AsParallel()' / 'Parallel.ForEach()' guidelines?

Question

Looking for a little advice on leveraging AsParallel() or Parallel.ForEach() to speed this up.

See the method I\'ve got (simplified/bastardized

Answer 1

This seems like an inherently serial operation to me. All you're doing is looping through a list of strings and inserting them into another list. The parallelization libraries are going to do that, plus a bunch of threading and synchronization - it'd probably end up slower.

Also, you should be using a HashSet if you don't want duplicates.