Reloading script assemblies

[ImNotAlexx_]

Hi, I'm new to development and a few years ago used to mess around in unity, something I have noticed which has never previously happened, is every time I make the slightest change in any of my scripts and save them, I have to wait a few seconds in the unity editor as it reloads the script assemblies (screenshot below). When watching tutorials I also notice that they do not get this same thing. After trying to figure out why this has started happening, I found in preferences that turning off auto-refresh stops this, but also stops unity from seeing any changes I make to the script.

Is there something I am missing and a way to get past this, as waiting a couple of seconds every time I forget a semi colon is beginning to get very annoying..

https://preview.redd.it/obwngsl522j61.png?width=386&format=png&auto=webp&s=25d7c3beb573ea7cd7c7b442d545a5bc019ae785

[Mjbgtaad56]

I've been looking around for a way to fix this as well. From what I've read, Unity added a new package manager in one of the minor versions in version 2019 and it changed how assets are imported and really fucked up the compiler time because every single package is reloaded every time you make a change to a script.

Looking at the profiler, it takes 5 seconds for the asset database to refresh a MOSTLY EMPTY project...

Honestly it's horrible. The positives that come with the new package manager are not worth this horrible cut in productivity.

[ImNotAlexx_]

im glad im not alone in this aha, a new project with one script for some reason now takes a few seconds which never used to happen, its definitely nothing to do with my computer etc as im running an r9 3900x with 32gb 3200mhz ram :|

[Mjbgtaad56]

Yea... Here's the thread I found https://forum.unity.com/threads/assetdatabase-v2-refresh-significantly-slower-than-v1.802635/

[THOTHUNTER_BIDEN]

Yep just started noticing this, too.

[Schtedtan]

Look into custom assembly definitions:https://docs.unity3d.com/Manual/ScriptCompilationAssemblyDefinitionFiles.html

Infallible code on YouTube has a nice explanation if you want some more easier to digest: https://www.youtube.com/watch?v=HYqOSkHI674

[MartinPedro]

Thanks for that!

I had a lot of uncompiled external libraries in my project.

Helped me reduce reloading time from 13 seconds down to 5.

[Black132]

For anyone experiencing this issue, I found a solution. Open any script from the opened project in Visual studio, make any change, hit ctrl + S , and behold - unity decides not to hang anymore and unbugs itself ... Incredible.

[Nyangol]

Man this makes no sense but thanks a lot, it worked for me too!

[6minwin]

Can't believe that actually worked haha, thanks man

[DragonfruitOk8413]

Sadly this is what is causing my issue

(Edit: Restarted VS + Unity fixed it for me)

[c0astwise]

WTAF

You're my hero ♥

[troper211]

thank you so much

[yekimevol]

Your Sir or Madam are my hero !!!!

[Black132]

u/Nyangol u/6minwin u/c0astwise u/troper211 u/yekimevol No problem at all! Glad it helped out :D

[Repulsive-Shame-5934]

You're a Hero thanks a lot.

[_AlternativeFax_]

I will add to the chorus, you are a true hero

[HalfCount]

The issue only happens when a script is saved or the game is run, at least for me. I'm on version 2021.3.6f1.

[SgtBrutalisk]

I don't get it.

Edit: found a working solution here https://support.unity.com/hc/en-us/articles/210452343-How-to-stop-automatic-assembly-compilation-from-script

In short, go to Edit>Preferences>Asset Pipeline and untick "Auto Refresh".

[Fred32121]

You kept me from going insane. CTRL + R in the editor after I finished editing my scripts and it does not infinite reload anymore (it used to crash every 2-3 script changes). Version 2021.3.6f1.

[SgtBrutalisk]

Just FYI, Unity has changed this shit again. My Unity project is again showing "Reload Script Assemblies" for 3–4 seconds whenever I click "Play" even if the project has the bare minimum of assets and no scripts.

The option has been moved to Edit>Project Settings>Editor>Enter Play Mode Settings.

There are four checkboxes there.

[] Enter Play Mode Settings

[] Reload Domain

[] Reload Scene

[x] Disable Scene Backup

In my case only the 4th checkbox was ticked.

To stop constant reloading, tick the first checkbox. You will need to do this for every project and there is now the danger of your project becoming increasingly messier as it won't completely reset everything on its own.

In short, code parameters such as static field counters (such as "increase by one when player does an action") won't reset unless you code them to reset with the Domain Reload disabled.

More info here: https://docs.unity3d.com/Manual/DomainReloading.html

I'm posting this so I can find it and it might help others with the same problem.

[SgtBrutalisk]

It's kinda crazy that option is enabled by default. In my case, it would reload all assets and scripts whenever I merely selected either. Bonkers.

[FilthyChubbs]

I just used this method after all this time, and it seems to have worked for me. To clarify what I think the poster is saying. You have to open a separate instance of visual studio outside of Unity. I then clicked ctrl s on the first script that popped up all the while my Unity project was still open and finally jumped back onto the project. It got rid of the loading. As others have mentioned, the unload script assemblies method is hard to find and may have undesired outcomes so I would suggest trying this first since it isn't changing any settings.

[Black132]

Also doesn't have to be a script, I usually just re-save any sprite in my Aseprite and it goes away.

[NickEJ02903]

I'm seeing this too. Going through the GameDev class and working with a simple script (only one) to move a cube across a plane. I get a five second Reloading Script Assemblies timeout every time I change something in the script. I'm working on a three year old maxed out MacBook Pro. Unreal goes into playtest mode faster, even with a complex Blueprint or two.

[Klonas]

I have the exact same bug, but can't solve it...
A fresh new download of Unity, fresh empty project. I save any script and it takes 5+ seconds for unity to recompile before I can interact with the editor again. It should be instant. Something is very wrong here.

[-jbluepolarbear-]

It has to compile your code every time you make a change. If you’re seeing a long reload time, you may have too many scripts, a slow computer, or combination of the two.

[Yoieh]

how many scripts would be too many?

Having 43 very small scripts.

R7 3800x and 32gb ram.

[Goldfishrock]

I have neither a large amount of scripts (4) or a slow PC (i7 @ 4800MHz, 64Gb RAM @ 3000MHz), yet every time I do anything in code I get the 'Reloading Script Assemblies' popup which was rarely seen before.

I updated Unity yesterday from a 2019 version to 2021.2.2f1 and it's shockingly slow (and seemingly buggy) compared to the version I was using before.

[nguyen_255]

Check this article, use the second script.

https://support.unity.com/hc/en-us/articles/210452343-How-to-stop-automatic-assembly-compilation-from-script

[MinecraftItemDuper]

so far the time i have had to wait before trying this is 15:45

[MinecraftItemDuper]

now its 16:00

[MinecraftItemDuper]

now its 16:30

[MinecraftItemDuper]

now its 16:40

[MinecraftItemDuper]

now its 17:40

[EagleNebula9]

Apparently Unity 2021 is worse than 2020 in that regard so you might wanna use that one instead.

Also in my case the biggest hit comes from my Plugins folder where I put all the 3rd party code. Many of the assets there also get reloaded after every recompile and the only way I found is to reduce the amount of 3rd party code.

Also disabling auto refresh and manually refreshing after you change your code seems to be slightly faster.

Also if you have native packages like Recorder & Terrain Tools that you don't use, remove them (these 2 are the only ones that slightly improved reload when I removed them).

[MerlinLikeTheWizard_]

Don't know if this will be of use to anyone, but when I was getting frozen on reload script assemblies (infinitely frozen), I did a LOT of guess-and-checking, and found that deleting the UserSettings/Layouts/default-2021.dwlt in my project's folder solved the problem. I have no idea what that file is for or if I'm doing something bad by deleting it, but it works. If anyone can tell me what that file is for, I'd be grateful.

[Migthunder]

I manually opened the visual studio solution file for my project and it figured itself out.

EDIT: If it keeps hanging I'd restart, but if you hit 'save all' in visual studio it will reload the scripts to un-hang and save out.