Slow Parallel.For interruption

Question

I have the following code inside a bigger loop, after profiling my code I discovered that all the Parallel.For gain in execution speed is lost in the long time the Stop() method takes to complete. Is there any way to improve this? Maybe calling Thread.Sleep()?

Thanks.

Parallel.For(0, 1000, (i, loopState) => 
{ 
   if (a == b)
       loopState.Stop(); 
}); 

Answer 1

I think you should use loopState.Break() method, since it is paralel for break keyword. The Stop method sets IsStopped flag, so that other iterations may check this flag and stop at their convenience. It does not stop the loop.

See Stop and Break on msdn