Monitor time taken to recompile scripts in Unity and log it

ScriptCompilationTime.cs

using System;
using System.IO;
using UnityEditor;
using UnityEditor.Callbacks;
using UnityEngine;

public static class ScriptCompilationTime
{
    private const string FileName = ".AssemblyReloadStarted.txt";
    private static readonly string FilePath = Path.Combine(Application.dataPath, FileName);
    
    [DidReloadScripts]
    private static void OnScriptsReloaded()
    {
        // This code will run after assembly reloading is complete.
        // Debug.Log("OnScriptsReloaded at " + DateTime.Now.ToString("HH:mm:ss.fff"));
        
        // Wait for end of compilation. 
        EditorApplication.delayCall += () =>
        {
            // Unserialize the start time.
            var lines = File.ReadAllLines(FilePath);
            var lastLine = lines[^1];
            var startTime = DateTime.Parse(lastLine); 
     
            var compileTime = DateTime.Now - startTime;

            // Log the time it took once the compilation is done
            Debug.Log($"Script compilation took {compileTime.TotalSeconds:F2} seconds");
        };
    }

    [InitializeOnLoadMethod]
    private static void RegisterAssemblyReloadEvents()
    {
        // Debug.Log("Registering assembly reload events at " + DateTime.Now.ToString("HH:mm:ss.fff"));
        AssemblyReloadEvents.beforeAssemblyReload += OnBeforeAssemblyReload;
    }
 
    private static void OnBeforeAssemblyReload()
    {
        AssemblyReloadEvents.beforeAssemblyReload -= OnBeforeAssemblyReload;
        
        // Debug.Log("OnBeforeAssemblyReload at " + DateTime.Now.ToString("HH:mm:ss.fff"));
        // This code will run just before assembly reloading starts.
        // Write a timestamp to a file before the script compilation starts
        using var writer = new StreamWriter(FilePath, false);
        writer.WriteLine(DateTime.Now);
        writer.Flush();
    }
}