Bug Compile times twice as long then previous versions

how to measure compile times:
add this script to an empty project:

Code (CSharp):

1. using UnityEngine;
2. using UnityEditor;
3. using System.Collections;
4. class CompileTime : EditorWindow {
5.  
6.     bool isTrackingTime;
7.     double startTime, finishTime, compileTime;
8.     [MenuItem("Window/Compile Times")]
9.     public static void Init() {
10.         EditorWindow.GetWindow(typeof(CompileTime));
11.     }
12.     void Update() {
13.         if (EditorApplication.isCompiling && !isTrackingTime) {
14.             startTime = EditorApplication.timeSinceStartup;
15.             isTrackingTime = true;
16.         }
17.         else if (!EditorApplication.isCompiling && isTrackingTime) {
18.             finishTime = EditorApplication.timeSinceStartup;
19.             isTrackingTime = false;
20.             compileTime = finishTime - startTime;
21.             Debug.Log("Script compilation time:" + compileTime.ToString("0.000") + "s");
22.         }
23.     }
24. }

https://pastebin.com/GeBm4vMT

1. now you got a new editor window under Window: Compile Times. You need to open that Compile time window and leave it open, otherwise it wont work. You need to open up the compile times window(Window: Compile Times) and just dock it somewhere visible
   
   
2. Create a empty new c# script and hit enter. unity starts the compiling process. And now you should have in the console something like this: "Script compilation time:1.532s" - this is the thing I wanna see Do it a few times. at the first try the time can be 4-5 seconds. after 2 or 3 attempts you should have a constant value

my times:
windows 10, 10th gen i9:

unity 2019LTS: Script compilation time:1.772s
unity 2020LTS: Script compilation time:1.867s
unity 2021.2: Script compilation time:3.235s

 

Following.

Out of curiosity, was this the same project across all editors, or a fresh project in each?

 

yes. always a fresh and new clean project using the... default render pipeline ( no HDRP, no URP). and then there is just this one script in the project

 

Did you take this test on M1? "unity 2021.2: Script compilation time:3.235s"

 

no, all tests using: windows 10, 10th gen i9.

from this thread:
https://forum.unity.com/threads/now-available-native-apple-silicon-editor-preview-builds.1122712/

the m1 compile times seam to be the same

 

i can also reproduce this - the editor freezes for longer after adding or editing scripts under 2021.2 than earlier versions of Unity.

here are my results running OP’s test:
2020.3: 2.2s
2021.1: 3.5s
2021.2: 4.4s

this is on a 2018 MacBook Pro 15” (Intel 8850H)

 

I believe this thread may already be covering the same issue, but it hasn’t been updated in a little while:

https://forum.unity.com/threads/any-update-regarding-increased-script-assembly-reload-time.1117138/

 

When I test Unity 2021.2.0a.19 on my MBP (M1), the compile time was around 2-3 seconds on native-version. non m1 native version takes way longer (I think around 6-8 seconds)

 

Interesting! Is 2021.2 still slower? Did anyone test it on M1 Max? I’m considering the new Mac Studio but if i need to use 2021.2 to use the Silicon version it might be same or worse even on a new machine? :/

 

2021.2 has zero improvements over that. I gave up tbh and stick to unity 2019 as long as i can. 2020 is still fine to use tho. But everything after that: unusable in my opinion

Also for compile times m1 vs m1 ultra wont be a noticeable difference since script compilation uses just 1 single core