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  1. using System;
  2. using System.Linq;
  3. using System.Diagnostics;
  4.  
  5. public class Program
  6. {
  7. 	public static void Main()
  8. 	{
  9. 		const int Flops = 100000;
  10. 		const int Repeats = 100;
  11. 		var random = new Random();
  12. 		var output = Enumerable.Range(0, Flops).Select(i => random.NextDouble()).ToArray();
  13. 		var left = Enumerable.Range(0, Flops).Select(i => random.NextDouble()).ToArray();
  14. 		var right = Enumerable.Range(0, Flops).Select(i => random.NextDouble()).ToArray();
  15. 		var timer = Stopwatch.StartNew();
  16. 		for (var i = 0; i < Flops - 1; i++)
  17. 		{
  18. 			unchecked
  19. 			{
  20. 				output[i] += left[i] * right[i];
  21. 			}
  22. 		}
  23.  
  24. 		timer.Stop();
  25. 		for (var i = 0; i < Flops - 1; i++)
  26. 		{
  27. 			output[i] = random.NextDouble();
  28. 		}
  29.  
  30. 		timer = Stopwatch.StartNew();
  31. 		for (var j = 0; j < Repeats; j++)
  32. 		{
  33. 			for (var i = 0; i < Flops - 1; i++)
  34. 			{
  35. 				unchecked
  36. 				{
  37. 					output[i] += left[i] * right[i];
  38. 				}
  39. 			}
  40. 		}
  41.  
  42. 		timer.Stop();
  43. 		Console.WriteLine("ms: {0}", timer.ElapsedMilliseconds);
  44. 		Console.WriteLine("MFLOPS: {0}", ((double)Flops * Repeats) / timer.ElapsedMilliseconds / 1000.0);
  45. 	}
  46. }
Success #stdin #stdout 0.25s 24344KB
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stdin
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Standard input is empty
stdout
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ms: 153
MFLOPS: 65.359477124183
https://ideone.com/ayKbxT
language:
C# (gmcs 5.20.1)
created:
10 years ago
visibility:
public

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