Visual Basic Planet

Using the Code

The following code defines two functions that compute the same result; the only difference is the period that the function waits before returning the result value. A callback Action is defined that writes out the result and the index of the winning function and the computation is performed for ten sequential integer values.

using System;

using System.Threading;

using System.Threading.Tasks;

namespace Speculative_Selection {

class Use_Speculative_Suggestion {

static void Main(string[] args) {

// create some sample functions Func<int, double> pFunction = value => { Random rnd = new Random(); Thread.Sleep(rnd.Next(l, 2000)); return Math.Pow(value, 2);

// create some sample functions Func<int, double> pFunction2 = value => { Random rnd = new Random(); Thread.Sleep(rnd.Next(l, 1000)); return Math.Pow(value, 2);

// define the callback

Action<long, double> callback = (index, result) => {

Console.WriteLine("Received result of {0} from function {l}", result, index);

// speculative compute for some values for (int i = 0; i < 10; i++) {

Speculative_Selection.Compute<int, double>( i, callback, pFunction, pFunction2);

// wait for input before exiting Console.WriteLine("Press enter to finish"); Console.ReadLine();

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