internal static void MergeForSelect()
{
int count = 10;
Stopwatch stopwatch = Stopwatch.StartNew();
ParallelQuery <int> notBuffered = ParallelEnumerable.Range(0, count)
.WithMergeOptions(ParallelMergeOptions.NotBuffered)
.Select(value => value + ComputingWorkload());
notBuffered.ForEach(value => $"{value}:{stopwatch.ElapsedMilliseconds}".WriteLine());
// 0:217 3:283 6:363 8:462 1:521 4:612 7:629 9:637 2:660 5:695
Trace.WriteLine(null);
stopwatch.Restart();
ParallelQuery <int> autoBuffered = ParallelEnumerable.Range(0, count)
.WithMergeOptions(ParallelMergeOptions.AutoBuffered)
.Select(value => value + ComputingWorkload());
autoBuffered.ForEach(value => $"{value}:{stopwatch.ElapsedMilliseconds}".WriteLine());
// 6:459 8:493 7:498 9:506 0:648 1:654 2:656 3:684 4:686 5:688
Trace.WriteLine(null);
stopwatch.Restart();
ParallelQuery <int> fullyBuffered = ParallelEnumerable.Range(0, count)
.WithMergeOptions(ParallelMergeOptions.FullyBuffered)
.Select(value => value + ComputingWorkload());
fullyBuffered.ForEach(value => $"{value}:{stopwatch.ElapsedMilliseconds}".WriteLine());
// 0:584 1:589 2:618 3:627 4:629 5:632 6:634 7:636 8:638 9:641
}