ASP.NET页面0毫秒下载是不是太快了?

发布于 2024-09-04 01:39:13 字数 1311 浏览 6 评论 0原文

我目前正在测量从 C# 程序加载网页所花费的时间。

Visual Studio 解决方案有一个控制台程序和一个只有一页的 ASP.NET 网站。该网站托管在 ASP.NET 开发服务器上。控制台应用程序如下查询网页:

bool isSuccess;

Stopwatch timeSpentToDownloadPage = Stopwatch.StartNew();

WebRequest request = HttpWebRequest.Create(new Uri("http://localhost:12345/Test.aspx", UriKind.Absolute));

request.Timeout = 200;

using (WebResponse response = request.GetResponse())
{
    Stream responseStream = response.GetResponseStream();
    StreamReader sr = new StreamReader(responseStream);
    string responseText = sr.ReadToEnd().Trim();
    isSuccess = (responseText == "Hello World");
}

timeSpentToDownloadPage.Stop();

该网页没有什么特别的,只是加载时的响应,没有 ASP.NET 代码:

protected void Page_Load(object sender, EventArgs e)
{
    Response.Write("Hello World");
}

现在,每次代码花费 0 毫秒时,秒表都会显示。完成所有工作(查询服务器、获取响应等)。

怎么可能呢?难道我做的事情有什么问题吗?真的,我预计至少 10-20 毫秒。执行所有客户端代码,然后 100 毫秒。 to:

  • [客户端]从uri中找到要查询的页面(不需要DNS查询,所以速度相当快),
  • [客户端]做请求,
  • [服务器端]初始化ASP.NET引擎,
  • [服务器端]处理请求,
  • [服务器端]查找并读取.aspx文件并执行编译的代码(至少读取文件可能需要几毫秒。),
  • [服务器端]构建响应,包括标头,然后发送它,
  • [客户端]接收响应并对其进行处理(修剪)。

那么为什么它的速度如此之快呢?是否存在一个棘手的缓存,它只是跳过所有/大部分步骤并将“Hello World”返回给客户端?

如果存在“隐藏”缓存,它在哪里以及如何禁用它来测量所花费的“真实”时间?

I'm currently measuring the time spent to load a web page from a C# program.

The Visual Studio solution has a console program and an ASP.NET website with just one page. The website is hosted on ASP.NET Development Server. The console application queries the web page like this:

bool isSuccess;

Stopwatch timeSpentToDownloadPage = Stopwatch.StartNew();

WebRequest request = HttpWebRequest.Create(new Uri("http://localhost:12345/Test.aspx", UriKind.Absolute));

request.Timeout = 200;

using (WebResponse response = request.GetResponse())
{
    Stream responseStream = response.GetResponseStream();
    StreamReader sr = new StreamReader(responseStream);
    string responseText = sr.ReadToEnd().Trim();
    isSuccess = (responseText == "Hello World");
}

timeSpentToDownloadPage.Stop();

The web page has nothing special, just a response on load and no ASP.NET code:

protected void Page_Load(object sender, EventArgs e)
{
    Response.Write("Hello World");
}

Now, the stopwatch shows every time that the code spent 0 ms. to do all the work (querying the server, getting the response, etc.).

How is it possible? Isn't there something wrong with what I'm doing? Really, I expected at least 10-20 ms. to execute all client-side code, then 100 ms. to:

  • [client side] Find the page to query from uri (which does not require DNS query, so it's quite fast),
  • [client side] Do the request,
  • [server side] Initialize ASP.NET engine,
  • [server side] Process the request,
  • [server side] Find and read .aspx file and execute compiled code (at least reading file may cost several ms.),
  • [server side] Build response, including headers, then send it,
  • [client side] Receive the response and process it (trim).

So why is it so extremely fast? Is there a tricky cache which just skips all/most of the steps and return "Hello World" to the client?

If there is a "hidden" cache, where is it and how can I disable it to measure the "real" time spent?

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紫竹語嫣☆ 2024-09-11 01:39:13

是的,这可以而且必须是 0 毫秒!因为您的服务器位于 localhost 上。尝试在全球网络的其他位置获取 ASP.NET 服务器。

并且您不会解析 localhost,因为这是 127.0.0.1 的常量地址。
与该地址的通信仅由操作系统内核操作。

Yes this can and must be 0 ms! Because your server is on a localhost. Try to get ASP.NET server somewhere else in a world wide network.

And you don't resolving localhost because this is a constant address to 127.0.0.1.
And communication to this address is operated only by the your OS kernel.

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