static async Task Main(string[] args)
{
Work work = new Work();
List <int> intList = Enumerable.Range(2, 100).ToList();
List <int> resultList1;
List <int> resultList2;
var sw = Stopwatch.StartNew();
resultList1 = intList.Select(x => {
Task.Delay(TimeSpan.FromMilliseconds(1000)).GetAwaiter();
return(work.NumAggregation(x));
}).ToList();
Console.WriteLine($"sequential - { sw.ElapsedTicks }");
sw.Restart();
resultList2 = intList.AsParallel().Select(x => {
Task.Delay(TimeSpan.FromMilliseconds(1000)).GetAwaiter();
return(work.NumAggregation(x));
}).ToList();
Console.WriteLine($"parallel - { sw.ElapsedTicks }");
resultList2.ForEach(x => Console.WriteLine(x));
/**
* Async in parallel vs sequential
*/
// parallel
var longTask = work.AsyncLongTask(500);
var longTask2 = work.AsyncLongTask(500);
var longTask3 = work.AsyncLongTask(500);
var longTask4 = work.AsyncLongTask(500);
var longTask5 = work.AsyncLongTask(500);
var longTask6 = work.AsyncLongTask(500);
var longTask7 = work.AsyncLongTask(500);
Stopwatch stopwatch = Stopwatch.StartNew();
Console.WriteLine(await longTask);
Console.WriteLine(await longTask2);
Console.WriteLine(await longTask3);
Console.WriteLine(await longTask4);
Console.WriteLine(await longTask5);
Console.WriteLine(await longTask6);
Console.WriteLine(await longTask7);
Console.WriteLine($"async timestamp - { stopwatch.ElapsedMilliseconds }");
stopwatch.Restart();
// sequential
Console.WriteLine(await work.AsyncLongTask(500));
Console.WriteLine(await work.AsyncLongTask(500));
Console.WriteLine(await work.AsyncLongTask(500));
Console.WriteLine(await work.AsyncLongTask(500));
Console.WriteLine(await work.AsyncLongTask(500));
Console.WriteLine(await work.AsyncLongTask(500));
Console.WriteLine(await work.AsyncLongTask(500));
Console.WriteLine($"sync timestamp - { stopwatch.ElapsedMilliseconds }");
/**
* Sync wrapped in task
*/
// Sync
stopwatch.Restart();
Console.WriteLine(work.NumAggregation(1000000));
Console.WriteLine(work.NumAggregation(1000000));
Console.WriteLine(work.NumAggregation(1000000));
Console.WriteLine(work.NumAggregation(1000000));
Console.WriteLine($"Sync - { stopwatch.ElapsedMilliseconds }");
stopwatch.Restart();
// Async
var asyncAggregation = work.AsyncNumAggregation(1000000);
var asyncAggregation1 = work.AsyncNumAggregation(1000000);
var asyncAggregation2 = work.AsyncNumAggregation(1000000);
var asyncAggregation3 = work.AsyncNumAggregation(1000000);
Console.WriteLine(asyncAggregation.GetAwaiter().GetResult());
Console.WriteLine(asyncAggregation1.GetAwaiter().GetResult());
Console.WriteLine(asyncAggregation2.GetAwaiter().GetResult());
Console.WriteLine(asyncAggregation3.GetAwaiter().GetResult());
Console.WriteLine($"Task based async - { stopwatch.ElapsedMilliseconds }");
}