walterlv

using System.Runtime.CompilerServices;

namespace Walterlv.Threading
{
    /// <summary>
    /// 表示一个可等待对象，如果一个方法返回此类型的实例，则此方法可以使用 `await` 异步等待。
    /// </summary>
    /// <typeparam name="TAwaiter">用于给 await 确定返回时机的 IAwaiter 的实例。</typeparam>
    public interface IAwaitable<out TAwaiter> where TAwaiter : IAwaiter
    {

nblumhardt

using System;
using System.Diagnostics;
using System.Linq;
using System.Runtime.CompilerServices;
using Serilog;
using Serilog.Configuration;
using Serilog.Core;
using Serilog.Events;

namespace ConsoleApp24

bartoszkp

// Intel(R) Core(TM) i7-2600 CPU @ 3.40 GHz 3.40 GHz
// 16 GB RAM, Windows 7, 64 bit
//
//No cast:0.854751600000001 +- 0.182965645566156ms
//Cast:0.724137 +- 0.148216330378943ms

// Conclusion: Cast is indeed faster, but remember that we are talking here about _miliseconds_
// for 1000 enumerations of an enum with 1000 elements. First verify whether this is really significant in your code, before
// proceeding with micro-optimizations.
// Context: http://stackoverflow.com/a/105402/2642204