Question

我认为我发现使用相同的连接组名称发送给example.com的100个请求比没有此请求会导致更快的总响应时间。实际上，似乎唯一的因素是我拨打电话的顺序（合并的电话，然后是非合并的电话，反之亦然）。

using System;
using System.Diagnostics;
using System.Net;
using System.Threading.Tasks;
using Xunit;
using Xunit.Abstractions;

public class WebRequestTests
{
    public WebRequestTests(ITestOutputHelper testOutputHelper) => _testOutputHelper = testOutputHelper;

    private readonly ITestOutputHelper _testOutputHelper;
    private const string CONNECTION_GROUP_NAME = nameof(CONNECTION_GROUP_NAME);

    private static TimeSpan Pooling(int numberOfRequests)
    {
        var requests = new WebRequest[numberOfRequests];
        var responses = new WebResponse[numberOfRequests];

        for (var i = 0; i < numberOfRequests; i++)
        {
            var request = WebRequest.Create("http://example.com");
            requests[i] = request;
        }

        var stopwatch = Stopwatch.StartNew();
        Parallel.For(0, numberOfRequests, i => { responses[i] = requests[i].GetResponse(); });
        stopwatch.Stop();
        return stopwatch.Elapsed;
    }

    private static TimeSpan NoPooling(int numberOfRequests)
    {
        var requests = new WebRequest[numberOfRequests];
        var responses = new WebResponse[numberOfRequests];

        for (var i = 0; i < numberOfRequests; i++)
        {
            var request = WebRequest.Create("http://example.com");
            request.ConnectionGroupName = CONNECTION_GROUP_NAME;

            requests[i] = request;
        }

        var stopwatch = Stopwatch.StartNew();
        Parallel.For(0, numberOfRequests, i => { responses[i] = requests[i].GetResponse(); });
        stopwatch.Stop();
        return stopwatch.Elapsed;
    }

    [Fact]
    public void ConnectionGroupPerformance()
    {
        const int numberOfRequests = 1000;
        _testOutputHelper.WriteLine($"Number of requests:  {numberOfRequests}");
        var poolingDuration = Pooling(numberOfRequests);

        var noPoolingDuration = NoPooling(numberOfRequests);
        var message = $"No Pooling {noPoolingDuration:g}, Pooling {poolingDuration:g}";

        _testOutputHelper.WriteLine(message);
        Assert.True(poolingDuration < noPoolingDuration, message);
    }
}

我还尝试为非池连接分配一个随机的组名，以防空字符串/空值作为组名。

我在这里想念什么？

Web连接组的异常行为

0 个答案: