你可能写了个假异步，并不能提高请求线程池的吞吐量

/// <summary> /// HttpGet /// </summary> /// <param name="url">url路径名称</param> /// <param name="cookie">cookie</param> public static string HttpGet(string url, CookieContainer cookie = null, WebHeaderCollection headers = null) {     try     {         // 设置参数         HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;         request.CookieContainer = cookie;         request.Method = "GET";         request.ContentType = "text/plain;charset=utf-8";          if (headers != null)         {             foreach (string key in headers.Keys)             {                 request.Headers.Add(key, headers[key]);             }         }          //发送请求并获取相应回应数据         HttpWebResponse response = request.GetResponse() as HttpWebResponse;         //直到request.GetResponse()程序才开始向目标网页发送Post请求         Stream instream = response.GetResponseStream();         StreamReader sr = new StreamReader(instream, Encoding.UTF8);         //返回结果网页（html）代码         string content = sr.ReadToEnd();         return content;     }     catch (Exception ex)     {         LogUtil.Error(ex);         return string.Empty;     } }

/// <summary> /// HttpGetAsync /// </summary> /// <param name="url">url路径名称</param> /// <param name="cookie">cookie</param> public static async Task<string> HttpGetAsync(string url, CookieContainer cookie = null, WebHeaderCollection headers = null) {     try     {         // 设置参数         HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;         request.CookieContainer = cookie;         request.Method = "GET";         request.ContentType = "text/plain;charset=utf-8";          if (headers != null)         {             foreach (string key in headers.Keys)             {                 request.Headers.Add(key, headers[key]);             }         }          //发送请求并获取相应回应数据         HttpWebResponse response = await request.GetResponseAsync() as HttpWebResponse;         //直到request.GetResponse()程序才开始向目标网页发送Post请求         Stream instream = response.GetResponseStream();         StreamReader sr = new StreamReader(instream, Encoding.UTF8);         //返回结果网页（html）代码         string content = sr.ReadToEnd();         return content;     }     catch (Exception ex)     {         LogUtil.Error(ex);         return string.Empty;     } }

/// <summary> /// 测试1 /// </summary> private async void button1_Click(object sender, EventArgs e) {     //task是自己写的独立线程池，为了防止测试过程对CLR线程池和异步线程池造成干扰     _task.Run(() =>     {         Thread.Sleep(200);          int workerThreads1, completionPortThreads1, workerThreads2, completionPortThreads2;         ThreadPool.GetMaxThreads(out workerThreads1, out completionPortThreads1);         ThreadPool.GetAvailableThreads(out workerThreads2, out completionPortThreads2);         Log("假异步 已使用辅助线程：" + (workerThreads1 - workerThreads2) + ", 已使用异步线程：" + (completionPortThreads1 - completionPortThreads2));     });      string str = await GetDataAsync(); }  /// <summary> /// 测试2  /// </summary> private async void button2_Click(object sender, EventArgs e) {     //task是自己写的独立线程池，为了防止测试过程对CLR线程池和异步线程池造成干扰     _task.Run(() =>     {         Thread.Sleep(200);          int workerThreads1, completionPortThreads1, workerThreads2, completionPortThreads2;         ThreadPool.GetMaxThreads(out workerThreads1, out completionPortThreads1);         ThreadPool.GetAvailableThreads(out workerThreads2, out completionPortThreads2);         Log("真异步 已使用辅助线程：" + (workerThreads1 - workerThreads2) + ", 已使用异步线程：" + (completionPortThreads1 - completionPortThreads2));     });      string str = await GetDataAsync2(); }  /// <summary> /// 假异步 /// </summary> private async Task<string> GetDataAsync() {     return await Task.Run<string>(() =>     {         //接口耗时大约1秒         return HttpUtil.HttpGet("http://localhost:8500/api/test/TestGet?val=1", null, null);     }); }  /// <summary> /// 真异步 /// </summary> /// <returns></returns> private async Task<string> GetDataAsync2() {     //接口耗时大约1秒     return await HttpUtil.HttpGetAsync("http://localhost:8500/api/test/TestGet?val=1", null, null); }