unity启动执行脚本检测编译速度（editor mode only）

using UnityEngine;
using UnityEditor;

[InitializeOnLoad]
class CompileTime : EditorWindow
{
    static bool isTrackingTime;
    static double startTime;

    static CompileTime()
    {
        EditorApplication.update += Update;
        startTime = PlayerPrefs.GetFloat("CompileStartTime", 0);
        if (startTime > 0)
        {
            isTrackingTime = true;
        }
    }


    static void Update()
    {
        if (EditorApplication.isCompiling && !isTrackingTime)
        {
            startTime = EditorApplication.timeSinceStartup;
            PlayerPrefs.SetFloat("CompileStartTime", (float)startTime);
            isTrackingTime = true;
        }
        else if (!EditorApplication.isCompiling && isTrackingTime)
        {
            var finishTime = EditorApplication.timeSinceStartup;
            isTrackingTime = false;
            var compileTime = finishTime - startTime;
            PlayerPrefs.DeleteKey("CompileStartTime");
            Debug.Log("Script compilation time: \n" + compileTime.ToString("0.000") + "s");
        }
    }
}