Created
March 28, 2013 08:11
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using System; | |
using System.Reflection; | |
namespace Tests | |
{ | |
class Program | |
{ | |
static void Main(string[] args) | |
{ | |
Benchmark(int.MaxValue / 2); | |
} | |
private static void Benchmark(int iterations) | |
{ | |
#region Вывод информации о платформе | |
PortableExecutableKinds peKind; | |
ImageFileMachine fMachine; | |
var curentAssembly = Assembly.GetExecutingAssembly(); | |
curentAssembly.GetModules()[0].GetPEKind(out peKind, out fMachine); | |
Console.WriteLine(peKind.HasFlag(PortableExecutableKinds.PE32Plus) ? "Running 64-bit assembly" : "Running 32-bit assembly"); | |
#endregion | |
System.Diagnostics.Stopwatch s = new System.Diagnostics.Stopwatch(); | |
long temp = 0; //измени тип этой переменной для проведения тестов необходимого типа | |
int ITER_COUNT = iterations; | |
Console.WriteLine("Now we're testing {0} type.\nNumber of iterations: {1}", temp.GetType(), ITER_COUNT); | |
Console.WriteLine(); | |
#region Умножение и деление | |
temp = 1; | |
s.Restart(); | |
for (int i = 0; i < ITER_COUNT; i++) | |
{ | |
temp *= 3; | |
} | |
s.Stop(); | |
Console.WriteLine("Multiptlication: {0} ms", s.ElapsedMilliseconds); | |
temp = int.MaxValue; | |
s.Restart(); | |
for (int i = 0; i < ITER_COUNT; i++) | |
{ | |
temp /= 2; | |
} | |
s.Stop(); | |
Console.WriteLine("Division: {0} ms", s.ElapsedMilliseconds); | |
#endregion | |
#region Сдвиги | |
temp = 1; | |
s.Restart(); | |
for (int i = 0; i < ITER_COUNT; i++) | |
{ | |
temp = (temp << 1) + (temp << 0); //умножение на произвольное число можнно записать в виде сдвигов, при необходимости | |
//но, польза от этого будет только при работе с типами, | |
//не вмещающимися в один регистр процессора | |
} | |
s.Stop(); | |
Console.WriteLine("Left shift: {0} ms", s.ElapsedMilliseconds); | |
temp = int.MaxValue; | |
s.Restart(); | |
for (int i = 0; i < ITER_COUNT; i++) | |
{ | |
temp >>= 1; | |
} | |
s.Stop(); | |
Console.WriteLine("Right shift: {0} ms", s.ElapsedMilliseconds); | |
Console.WriteLine(); | |
Console.WriteLine("FINISH"); | |
} | |
} | |
} |
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