기본 프로파일링과 추적(개념)

시간 측정 및 추적 기초

스톱워치 데모

using System;
using System.Diagnostics;
using System.Threading;

// Simple loop timing with warmup; C# 6 compatible.
public class Program
{
  static int Work(int n)
  {
    int s = 0;
    for (int i = 0; i < n; i++) s += i; // small CPU work
    return s;
  }

  public static void Main(string[] args)
  {
    // Warm up (JIT/caches)
    Work(10000);

    var sw = Stopwatch.StartNew();
    for (int r = 0; r < 10; r++)
    {
      Work(20000);
    }
    sw.Stop();

    Console.WriteLine("Elapsed ms (10 runs): " + sw.ElapsedMilliseconds);
  }
}

시간 측정 범위 도우미

using System;
using System.Diagnostics;

// A small scope that times a block and prints on dispose.
public sealed class TimeScope : IDisposable
{
  private readonly string _name;
  private readonly Stopwatch _sw;

  public TimeScope(string name)
  {
    _name = name;
    _sw = Stopwatch.StartNew();
  }

  public void Dispose()
  {
    _sw.Stop();
    Console.WriteLine(_name + " took " + _sw.ElapsedMilliseconds + " ms");
  }
}

public class Program
{
  static void DoWork()
  {
    // pretend work
    long s = 0;
    for (int i = 0; i < 300000; i++) s += i;
    if (s == -1) Console.WriteLine();
  }

  public static void Main(string[] args)
  {
    using (new TimeScope("DoWork"))
    {
      DoWork();
    }
  }
}

연관 ID 데모

using System;
using System.Diagnostics;

// Use a correlation ID so related trace lines can be grouped.
public class Program
{
  public static void Main(string[] args)
  {
    Trace.Listeners.Clear();
    Trace.Listeners.Add(new ConsoleTraceListener());

    Guid id = Guid.NewGuid();
    Trace.CorrelationManager.ActivityId = id;

    Trace.TraceInformation("Start request");
    // ... do work
    Trace.TraceInformation("Processing step A");
    Trace.TraceInformation("Processing step B");
    Trace.TraceInformation("End request");

    Console.WriteLine("ActivityId: " + id);
  }
}

프로파일링 개요

측정 관리

마이크로벤치마크 규칙

복습