代码之家 › 专栏 › 技术社区 › Miguel
通过本地路径访问文件和通过UNC共享路径访问文件在性能上有什么不同吗

unc performance windows
1
Miguel · 技术社区 · 8 年前
我有几个模板文件,托管在许多地方,主要原因是每个模块都有相应的模板本地访问。
后来,我意识到这些文件是通过每个箱子的UNC共享路径使用的。
通过本地路径而不是UNC路径访问本地文件之间是否存在性能差异?
1 回复 | 直到 8 年前
1
3
Miguel 8 年前
看起来开销最小。我使用以下代码运行了一些计时测试:
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()));
结果如下:
我的结论是这无关紧要。