Difference linq and plinq

Question

What is the difference between these two?

What is the best way to compare ?

It is always better plinq ?

When we use plinq ?

Answer 1

PLinq is the parallel version of Linq. Some queries can be executed on multiple threads and then PLinq gives a performance increase.

However other queries can´t be executed in parallel or will give wrong results if done so. So when to use PLinq is something you should decide on for each query and make sure the performance actually increases.

MSDN has a lot of documentation on it.