LINQ can be more faster with the availability of multi-core desktops. This can be implemented with minimal impact at the code level with existing code.
Here how it looks like,
Dim arrInt = Enumerable.Range(1, 4000000)
Dim q =
From n In arrant
In my dual core machine it takes around 2693 millisecond. But with a little tweak you can make it faster
Dim q =
From n In arrInt.AsParallel()
Now this takes 1527 milliseconds. Clearly something to think about.
Behind the scene
What happens in this case? All the Where / Select becomes Lambda expression like
arrInt.AsParallel().Where(Function(n) IsPrime(n)).Select(Function(n) n)
When we were using without AsParallel(), Where/Select were coming from Enumerable class. After we have implemented the AsParallel() it now calls the method from ParallelEnumerable class.
ParallelEnumerable class internally implements the new “Task” API.