High-Performance Timer in C#

亦凉 2022-08-02 14:48 192阅读 0赞

继上一篇 [http://blog.csdn.net/Joyhen/article/details/17222273][http_blog.csdn.net_Joyhen_article_details_17222273]

原文：[http://www.codeproject.com/Articles/2635/High-Performance-Timer-in-C][http_www.codeproject.com_Articles_2635_High-Performance-Timer-in-C]

上码：

namespace ConsoleApplication1
    {
        using System;
        using System.Runtime.InteropServices;
        using System.ComponentModel;
        using System.Threading;
    
        internal class HiPerfTimer
        {
            const string dll = "Kernel32.dll";
    
            [DllImport(dll)]
            private static extern bool QueryPerformanceCounter(out long lpPerformanceCount);
    
            [DllImport(dll)]
            private static extern bool QueryPerformanceFrequency(out long lpFrequency);
    
            private long startTime, stopTime;
            private long freq;
    
            // Constructor
            public HiPerfTimer()
            {
                startTime = 0;
                stopTime  = 0;
    
                if (QueryPerformanceFrequency(out freq) == false)
                {
                    // high-performance counter not supported
                    throw new Win32Exception();
                }
            }
    
            // Start the timer
            public void Start()
            {
                // lets do the waiting threads there work
                Thread.Sleep(0);
    
                QueryPerformanceCounter(out startTime);
            }
    
            // Stop the timer
            public void Stop()
            {
                QueryPerformanceCounter(out stopTime);
            }
    
            // Returns the duration of the timer (in seconds)
            public double Duration
            {
                get
                {
                    return (double)(stopTime - startTime) / (double) freq;
                }
            }
        }
    }

使用：

static void Main(string[] args)
            {
                HiPerfTimer pt = new HiPerfTimer();
                pt.Start();
    
                var items = Guid.NewGuid();
                Console.WriteLine(items.ToString());
    
                pt.Stop();
    
                Console.WriteLine("Duration: {0} sec\n", pt.Duration);
    
                Console.ReadKey();
            }

![SouthEast][]

[http_blog.csdn.net_Joyhen_article_details_17222273]: http://blog.csdn.net/Joyhen/article/details/17222273
[http_www.codeproject.com_Articles_2635_High-Performance-Timer-in-C]: http://www.codeproject.com/Articles/2635/High-Performance-Timer-in-C
[SouthEast]: /images/20220731/62c319d7732b462093120dacc671f7a5.png