public void ThreadTaskComparison()
{
Stopwatch watch = new Stopwatch();
//64 is upper limit for WaitHandle.WaitAll() method
int maxWaitHandleWaitAllAllowed = 64;
ManualResetEventSlim[] mres =
new ManualResetEventSlim[maxWaitHandleWaitAllAllowed];
for (int i = 0; i < mres.Length; i++)
{
mres[i] = new ManualResetEventSlim(false);
}
long threadTime = 0;
long taskTime = 0;
watch.Start();
//start a new classic Thread and signal the ManualResetEvent when its done
//so that we can snapshot time taken, and
for (int i = 0; i < mres.Length; i++)
{
int idx = i;
Thread t = new Thread((state) =>
{
for (int j = 0; j < 10; j++)
{
Console.WriteLine(string.Format("{0}:, outputing {1}",
state.ToString(), j.ToString()));
}
// Signal each event
mres[idx].Set();
});
t.Start(string.Format("Thread{0}", i.ToString()));
}
// WaitHandle.WaitAll((from x in mres select x.WaitHandle).ToArray());
WaitHandle.WaitAll((mres.Select((x) => x.WaitHandle).ToArray()));
threadTime = watch.ElapsedMilliseconds;
watch.Reset();
for (int i = 0; i < mres.Length; i++)
{
mres[i].Reset();
}
watch.Start();
for (int i = 0; i < mres.Length; i++)
{
int idx = i;
// Notice the two args passed to StartNew()
Task task = Task.Factory.StartNew((state) =>
{
for (int j = 0; j < 10; j++)
{
Console.WriteLine(string.Format("{0}:, outputing {1}",
state.ToString(), j.ToString()));
}
mres[idx].Set();
}, string.Format("Task{0}", i.ToString()));
}
WaitHandle.WaitAll((from x in mres select x.WaitHandle).ToArray());
taskTime = watch.ElapsedMilliseconds;
Console.WriteLine("Thread Time waited : {0}ms", threadTime);
Console.WriteLine("Task Time waited : {0}ms", taskTime);
for (int i = 0; i < mres.Length; i++)
{
mres[i].Dispose();
}
Console.WriteLine("All done, press Enter to Quit");
Console.ReadLine();
}
