コンパイル時間計測 (Unity2018/2019対応版)

CompileTime.cs

// referred to:
//     http://baba-s.hatenablog.com/entry/2019/05/22/084000
//     https://forum.unity.com/threads/editorapplication-iscompiling-is-always-false.770126/

using UnityEngine;
using UnityEditor;
#if UNITY_2019_1_OR_NEWER
using UnityEditor.Compilation;
#endif

namespace Tools.Editor
{
    [InitializeOnLoad]
    class CompileTime : EditorWindow
    {
        static bool isTrackingTime;
        static double startTime;

        static void ShowLog(ref double compileTime)
            => Debug.Log($"Script compilation time: \n {compileTime:0.000}s");

#if UNITY_2019_1_OR_NEWER
    static CompileTime()
    {
        CompilationPipeline.compilationStarted += StartCompile;
        CompilationPipeline.compilationFinished += FinishCompile;
    }

    static void StartCompile(object value)
    {
        startTime = EditorApplication.timeSinceStartup;
    }

    static void FinishCompile(object value)
    {
        var finishTime = EditorApplication.timeSinceStartup;
        var compileTime = finishTime - startTime;
        ShowLog(ref compileTime);
    }

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


        static void Update()
        {
            if (EditorApplication.isCompiling && !isTrackingTime)
            {
                startTime = EditorApplication.timeSinceStartup;
                EditorPrefs.SetFloat("CompileStartTime", (float) startTime);
                isTrackingTime = true;
            }
            else if (!EditorApplication.isCompiling && isTrackingTime)
            {
                var finishTime = EditorApplication.timeSinceStartup;
                isTrackingTime = false;
                var compileTime = finishTime - startTime;
                EditorPrefs.DeleteKey("CompileStartTime");
                ShowLog(ref compileTime);
            }
        }
#endif
    }
}