代码

using System;

DateTime d = DateTime.Now;
TimeSpan ts = new TimeSpan(d.Ticks);
double startTime = ts.TotalMilliseconds;  //获得当前时间的总毫秒数.

使用案例

void OnGUI(){
    if (GUI.Button(new Rect(0,0,200,100),"find")) {
        DateTime d = DateTime.Now;
        TimeSpan ts = new TimeSpan(d.Ticks);
        double startTime = ts.TotalMilliseconds;  //获得当前时间的总毫秒数.
        GameObject obj = GameObject.Find("GameObject (" + num +")");
        num++;
        d = DateTime.Now;
        ts = new TimeSpan(d.Ticks);
        double endTime = ts.TotalMilliseconds;
        msg = "time(ms):" + (endTime - startTime) + " obj:" + obj.name;
    }
    if (GUI.Button (new Rect (0, 100, 300, 300), msg)) {

    }
}