C#对象创建比构造函数调用慢得多

public class WorkUnit : IWorkUnit
{
    private JobInformation m_JobInfo;
    private MetaInfo m_MetaInfo;
    private IPreProcJobInfo m_PreprocDetails;


    readonly private Guid m_ID;
    private Guid m_ParentID;
    private Guid m_MasterJobID;


    private string m_ErrorLog = string.Empty;
    private PriorityKeeper m_Priority;
    private WorkUnitClassification m_Classification;

    private IJobPayload m_CachedPayload;
    private IJobLogger m_Logger;
    private EventHandler<JobEventArgs> m_IsFinished;
    private ReaderWriterLockSlim m_Lock;

    public WorkUnit(string InputXML,Guid JobID,IJobLogger Logger)
    {
        DateTime overstarttime = DateTime.Now;

        try
        {
        ....Do Stuff....
        }
        catch(XMLException e)
        {...}
        catch(Exception e)
        {
         ...
         throw;
        }

        double time = (DateTime.Now - overstarttime).TotalMilliseconds
        Console.WriteLine("{0}",time);
    }

    /// <summary>
    /// Private Constructor used to create children
    /// </summary>
    private WorkUnit(Guid MasterID,Guid ParentID,WorkUnitClassification Classification,PriorityKeeper Keeper)
    {...}

    [OnDeserializing()]
    private void OnDeserialize(StreamingContext s)
    {...}

    public PriorityKeeper PriorityKey
    {...}

    public bool HasError
    {...}

    public bool Processing
    {...}

    public bool Splittable
    {...}

    public IEnumerable<IWorkUnit> Split(int RequestedPieces,int Bonds)
    {...}

    public void Merge(IResponse finishedjob)
    {...}

    public ReadOnlyCollection<IWorkUnit> Children
    {...}

    public bool IsMasterJob
    {...}

    public Guid MasterJobID
    {...}

    public Guid ID
    {...}

    public Guid ParentID
    {...}

    public EnumPriority Priority
    {...}

    public void ChangePriority(EnumPriority priority)
    {...}

    public string ErrorLog
    {...}

    public IMetaInfo MetaData
    {...}

    public IJobPayload GetProcessingInfo()
    {... }

    public IResponseGenerator GetResponseGenerator()
    {... }

}

现在,我正在测量创建对象所需的总时间

DateTime starttime = DateTime.Now;
var test = new WorkUnit(temp,JobID,m_JobLogger);
double finished = (DateTime.Now - starttime).TotalMilliseconds;

我一直得到以下表现数字 –

构造函数时间 – 47毫秒

对象创建时间 – 387毫秒

47毫秒是可以接受的,387真的很糟糕.取出记录可以忽略不计地改变这些数字.有谁知道为什么这么长时间？我的系统是VS 2008 SP1,针对Windows XP上的.NET 3.5 SP1.我将不胜感激任何解释.我将很快打破探查器,但我觉得它无法深入研究解释这种行为所需的水平.谢谢你的帮助.

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