相关疑难解决方法(0)

我对dynamicC#的性能有疑问.我读过dynamic让编译器再次运行,但是它做了什么？

是否必须dynamic使用用作参数的变量或仅具有动态行为/上下文的行重新编译整个方法？

我注意到使用dynamic变量可以将简单的for循环减慢2个数量级.

我玩过的代码:

internal class Sum2
{
    public int intSum;
}

internal class Sum
{
    public dynamic DynSum;
    public int intSum;
}

class Program
{
    private const int ITERATIONS = 1000000;

    static void Main(string[] args)
    {
        var stopwatch = new Stopwatch();
        dynamic param = new Object();
        DynamicSum(stopwatch);
        SumInt(stopwatch);
        SumInt(stopwatch, param);
        Sum(stopwatch);

        DynamicSum(stopwatch);
        SumInt(stopwatch);
        SumInt(stopwatch, param);
        Sum(stopwatch);

        Console.ReadKey();
    }

    private static void Sum(Stopwatch stopwatch)
    {
        var sum = 0;
        stopwatch.Reset();
        stopwatch.Start();
        for …