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Bug Compile times twice as long then previous versions

Discussion in '2021.2 Beta' started by RobertOne, Jun 10, 2021.

  1. RobertOne

    RobertOne

    Joined:
    Feb 5, 2014
    Posts:
    261
    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
     
    Last edited: Jun 10, 2021
  2. sk0g

    sk0g

    Joined:
    Mar 5, 2021
    Posts:
    33
    Following.

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

    RobertOne

    Joined:
    Feb 5, 2014
    Posts:
    261
    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
     
    Last edited: Jun 10, 2021
    fairtree likes this.
  4. marwanzaky

    marwanzaky

    Joined:
    Mar 20, 2019
    Posts:
    11
    Did you take this test on M1? "unity 2021.2: Script compilation time:3.235s"
     
    RobertOne likes this.
  5. RobertOne

    RobertOne

    Joined:
    Feb 5, 2014
    Posts:
    261
  6. aromana

    aromana

    Joined:
    Nov 11, 2018
    Posts:
    137
    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)
     
    RobertOne likes this.
  7. aromana

    aromana

    Joined:
    Nov 11, 2018
    Posts:
    137
    RobertOne likes this.
  8. marwanzaky

    marwanzaky

    Joined:
    Mar 20, 2019
    Posts:
    11
    endangeredAnimal and RobertOne like this.
  9. nicmarxp

    nicmarxp

    Joined:
    Dec 3, 2017
    Posts:
    406
    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? :/
     
  10. RobertOne

    RobertOne

    Joined:
    Feb 5, 2014
    Posts:
    261
    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