MVC控制器的异步与同步基准测试

Question

我使用ASP.NET MVC4中的异步方法设置了这篇MSDN文章中的示例，并进行了一些基准测试，看看我会得出什么结论。

• Windows 7 Professional(x64)
• IIS 7.5
• 英特尔酷睿i7-2600S@2.80HGz
• 8GB内存
• Apppool>最大辅助进程数：10

我设置了两个控制器sync和Async，并使用加载器工具进行了一些测试。加载器工具在一分钟内只发送50-60个常量请求。每个控制器调用相同的webservice 3次。每个代码如下：

public ActionResult Sync()
{
    var g1 = GetGizmos("url1");
    var g2 = GetGizmos("url2");
    var g3 = GetGizmos("url3");
    return Content("");
}
    
public object GetGizmos(string uri)
{
    using (WebClient webClient = new WebClient())
    {
        return JsonConvert.DeserializeObject(
         webClient.DownloadString(uri)
        );
    }
}

public async Task<ActionResult> Async()
{
    var g1 = GetGizmosAsync("url1");
    var g2 = GetGizmosAsync("url2");
    var g3 = GetGizmosAsync("url3");
    var a1 = await g1;
    var a2 = await g2;
    var a3 = await g3;  
    return Content("");
}


public async Task<object> GetGizmosAsync(string uri)
{            
    using (HttpClient httpClient = new HttpClient())
    {
        var response = await httpClient.GetAsync(uri);
        return (await response.Content.ReadAsAsync<object>());
    }
}
    

System.Net.ServicePointManager.DefaultConnectionLimit = 1000;

Answer 1

webClient.DownloadString(uri)

到

var response = await httpClient.GetAsync(uri);
return (await response.Content.ReadAsAsync<object>());

也许你可以试试

webclient.DownloadStringAsync(uri)

您可以优化异步代码以

await Task.Run(() => {
    // just run your sync code here
    var g1 = GetGizmos("url1");
    var g2 = GetGizmos("url2");
    var g3 = GetGizmos("url3");
    return Content("");
});