通过本地路径访问文件或访问 UNC 共享路径在性能上是否存在差异

Question

我有几个模板文件托管在很多地方，主要原因是每个模块都有相应的本地可访问模板。

后来，我意识到这些文件是通过每个盒子的 UNC 共享路径使用的。

我的问题是：通过本地路径访问本地文件与通过 UNC 路径访问本地文件有什么性能差异吗？

Answer 1

看起来开销最小。我运行使用以下代码进行一些计时测试：

var localTimes = new List<long>();
var sharedTimes = new List<long>();

var stopwatch = new Stopwatch();
for (int i = 0; i < 1000; i++)
{
    stopwatch.Start();
    var bytes = File.ReadAllBytes(@"E:\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"E:\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"E:\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"E:\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"E:\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"E:\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"E:\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"E:\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"E:\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"E:\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"E:\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"E:\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"E:\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"E:\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"E:\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"E:\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"E:\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"E:\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"E:\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"E:\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"E:\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"E:\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"E:\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"E:\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"E:\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"E:\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"E:\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"E:\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"E:\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"E:\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"E:\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"E:\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"E:\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"E:\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"E:\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"E:\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"E:\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"E:\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"E:\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"E:\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"E:\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"E:\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"E:\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"E:\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"E:\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"E:\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"E:\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"E:\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"E:\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"E:\Shared\Template.xlsx");
    stopwatch.Stop();

    localTimes.Add(stopwatch.ElapsedTicks);

    stopwatch.Start();
    bytes = File.ReadAllBytes(@"\localhost\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"\localhost\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"\localhost\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"\localhost\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"\localhost\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"\localhost\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"\localhost\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"\localhost\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"\localhost\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"\localhost\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"\localhost\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"\localhost\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"\localhost\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"\localhost\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"\localhost\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"\localhost\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"\localhost\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"\localhost\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"\localhost\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"\localhost\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"\localhost\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"\localhost\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"\localhost\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"\localhost\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"\localhost\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"\localhost\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"\localhost\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"\localhost\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"\localhost\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"\localhost\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"\localhost\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"\localhost\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"\localhost\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"\localhost\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"\localhost\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"\localhost\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"\localhost\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"\localhost\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"\localhost\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"\localhost\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"\localhost\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"\localhost\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"\localhost\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"\localhost\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"\localhost\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"\localhost\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"\localhost\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"\localhost\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"\localhost\Shared\Template.xlsx");
    bytes = File.ReadAllBytes(@"\localhost\Shared\Template.xlsx");
    stopwatch.Stop();

    sharedTimes.Add(stopwatch.ElapsedTicks);
}

Console.WriteLine("Local: avg={0}, 50k={1}", TimeSpan.FromTicks((long)localTimes.Average()/50), TimeSpan.FromTicks(localTimes.Sum()));
Console.WriteLine("Shared: avg={0}, 50k={1}", TimeSpan.FromTicks((long)sharedTimes.Average()/50), TimeSpan.FromTicks(sharedTimes.Sum()));

这些是结果：

本地：平均=00:00:00.0567284，50k=00:47:16.4212917

共享：avg=00:00:00.0568292, 50k=00:47:21.4612018

我的结论是没关系。

通过本地路径访问文件或访问 UNC 共享路径在性能上是否存在差异

Is there any difference in performance between accessing a file through local path or to UNC shared path

windows

performance

unc