最適化実験 - つーさのくーかん

2010/05/30(日)最適化実験

2010/05/30 06:14 プログラミング::C#つーさ

暗黙的型変換の最適化に関する実験。

public struct A
{
    public A(int x, int y) { this.X = x; this.Y = y; }
    public int X, Y;
}

public struct B
{
    public B(int p1, int p2) { this.p1 = p1; this.p2 = p2; }
    public int p1, p2;

    public static implicit operator A(B b) { return new A(b.p1, b.p2); }
}

private int Calc(A a) { return a.X + a.Y; }

private void Test()
{
    Stopwatch sw = new Stopwatch();
    sw.Start();
    for (int x = 0; x < 100; x++)
    {
        int count = 0;
        for (int i = 0; i < 10000000; i++)
        {
            count += Calc(new A(count, 1)); // これと
            count += Calc(new B(count, 1)); // これの違い？
        }
    }
    sw.Stop();
    MessageBox.Show((sw.ElapsedMilliseconds / 100).ToString()+"ms.");
}