public static List <long> GetPrimesParallel(long first, long last)
{
var lockObject = new object();
IEnumerable <long> result = new List <long>();
Parallel.ForEach(
Partitioner.Create(first, last),
() => new List <long>(),
(range, loopState, partialResult) =>
{
for (long i = range.Item1; i < range.Item2; i++)
{
if (PrimeTool.IsPrime(i))
{
partialResult.Add(i);
}
}
return(partialResult);
},
(partialResult) =>
{
lock (lockObject)
{
result = result.Concat(partialResult);
}
}
);
return(result.OrderBy(s => s).ToList());
}
public void TestRange(long first, long last)
{
Console.WriteLine("Testing range {0} - {1}", first, last);
Console.Write(" Sequential:");
MeasureTime(new Action(() => PrimeTool.GetPrimesSequential(first, last)));
Console.Write(" Parallel: ");
MeasureTime(new Action(() => PrimeTool.GetPrimesParallel(first, last)));
Console.WriteLine();
}
public void CheckCorrectness()
{
var s = PrimeTool.GetPrimesSequential(1, 40);
var p = PrimeTool.GetPrimesParallel(1, 40);
for (int i = 0; i < s.Count; i++)
{
Console.WriteLine("{0} == {1}", s[i], p[i]);
}
Console.WriteLine();
}
public async void WarmUp()
{
var s = PrimeTool.GetPrimesSequential(1, 5);
var p = await PrimeTool.GetPrimesParallelAsync(1, 5);
}
