Questions about Build Report Tool

Hi,

first of all thanks for providing the build report tool (http://files.unity3d.com/build-report/). It's great and a good way to see whats going on inside of a WebGL build. Now that i played a little bit around with it i have a few questions.

1. Here's a screenshot of the modules included in a WebGL build with no assets (only one scene with a main camera):



I think the module Audio can be excluded by removing the AudioListener component from the main camera. But why are the modules CloudWebServices and UnityWebRequest added to the build? Is there any way to exclude them from the build?

2. Here's is another screenshot of a WebGL build. The only thing changed (compared to the porject mentioned above) is that a Button-Prefab was added in the Asset folder:



As you can see a lot of modules are added to the build and the size is 19MB instead of 11MB. The biggest module is "Physics". Is there a way to exclude any of this modules (especially the Physics)? Or is this the minimum number of modules for a project which uses the UI elements.

I appreciate any hint how to reduce number of modules or the final size of the build. And thanks again for providing the build report tool ;-)

 

I have a similar request: while the build tool is pretty awesome for determining what's stripped, it would be nice if it listed dependencies too (e.g. what scripts and modules in your project are using physics). It's already been helpful though in it's current form, but adding dependencies would make it perfect.

 

Thank you for answering the questions! I build the test project with Unity 5.5 Beta and all the dependencies disappeared. The project is only about half of the size compared to the build with version 5.4. I think that's a huge step forward! Thanks again for the great work

 

I just noticed that Physics and Physics2D Modules are added to the dependencies if you reference the UI-Module via Script:

For example:
...
using UnityEngine.UI;
...

public class NewBehaviourScript : MonoBehaviour {

private Button btn;
...
}

I think its the same if you add UnityEngine.Events or UnityEngine.EventSystems. Is it possible to fix this?

 

Where can i find information on what is this tool and how it can be used ?

 

If you use Unity 5.4 or higher you can just build a WebGL project and enter this page http://files.unity3d.com/build-report/. Then press the "understood" button and you will get a report about your last build.

 

Is this always going to be the case? We reference the Unity's UI system in code (a lot) and thus physics does not get stripped (even though we don't use it, directly at least). I'd love to strip physics if possible (it's huge portion of our total code size).

 

It kind of has. As noted by @OOLE, if you have UI objects in the scene (and not referenced in code), then 5.5 will strip physics from the build. I have confirmed that this works. However, if I create an empty project and include even just a simple script like this:

Code (CSharp):

1. using UnityEngine;
2. using UnityEngine.UI;
3.  
4. public class Sad : MonoBehaviour
5. {
6.     public Button button;  
7. }

Then 5.5 (even using patch release 3) will include physics and physics 2D. Is this the expected behavior?

 

Hey Jonas, thanks for fixing this! I just tried it out in 5.6 and it does seem to be correctly stripping the physics (both 3D and 2D) in 5.6.

I have a couple other questions for you about the build report tool, if you don't mind:

* Other than OnGUI(), what might cause the IMGUI module to be included in a build? I've been trying to remove stuff from our project piece by piece to determine this, but even after removing external libraries we have 10,000 lines of code - I could use a hint

* What is the UnityConnect Module? It always seems to be included, and it brings with it a few other modules. The only thing I can find called UnityConnect is the UnityConnectSettings.asset in the ProjectSettings. It looks like it's related to the Services window and settings, which we have totally disabled. I can't find any reference on Google. Whatever it is, I'm pretty sure I don't want it - so how do we remove this from our build?
(Note: I think I figured this one out: if you don't check 'disable HW statistics', it looks like it pulls in all this Unity Connect stuff - checking that box removes about half a meg from the build.)

* What kinds of stuff goes in the IL2CPP Generated module? Even in a blank project in 5.6, this is still about 8 GB. This can't be the core Unity engine stuff, since that's recorded separately (under Core Module, Physics, Audio, Animations, etc.). So what does it contain?

Thanks much!

 

I too am interested in the IL2CPP module. Mine is more like 12 mb. Is this user code? Why would a WebGL build even have CPP code? I thought it gets converted to js via emscripten.

 

Thanks for the reply!

Yep, my own tests seem to confirm this. If you have any script that has 'using UnityEngine.EventSystems', it will pull in the IMGUI stuff. It would be nice to break this dependency - doesn't seem to be any real reason for it. (I took a quick look through the UnityEngine.UI dll, and didn't see anything referencing IMGUI.)

There's nothing that specifically explains this, as far as I can see - here's a screenshot of what I see from a build in 5.6:


I was able to figure it out, but it would be nice if it referenced something a bit more specific, like the ProjectSettings file that's causing it to be included. I'm sure that's a lot of work though

Thanks, that's helpful! So in an empty project, the 3 MB that I see in Unity 5.6 would be the basic Unity dlls, and Core would contain the engine stuff (in C++). So when I look inside Core and see something like Component, that's the C++ implementation of Components that's binded to the C# implementation with the [MethodImpl(MethodImplOptions.InternalCall)] attributes?

 

Hey Jonas, can you confirm that this behavior is fixed in 5.6?
I'm using 5.6.1p2 and the physics module still gets implemented:



In our whole project there is not a single line referring to Rigidboys, BoxCollider or Physics in general. Moreover there are no physic-components in our scene or on any prefab.

I running out of ideas how to get rid of the physics module and it seems like it is still being pulled in via some weird connection/reference in Unity itself.

Could it be TextMehPro? I doubt it....but as I said: I'm running out of ideas :-(

 

Yes TextMeshPro references physics in TMP_SubMesh.cs (you'll have to comment it out, assuming you don't use the feature!). And yes I can confirm physics stripping is fixed in 5.6 and 5.6.1 (I'll assume they didn't break it in p1 or p2).

@jonas-echterhoff , do you know if this is intended? This effects us too obviously and I filled a bug report but the response I got was basically "by design". It would be nice to strip IMGUI.

 

Thank you @kognito1 !
Unfortunately I'm using the free version of TMP and it comes with precompiled .dll files. There is no sourcecode I could edit. Damn, I really hoped to get rid of the physics module after rewriting our click-detection routine. It's kind of frustrating.... :-/

 

Thanks indeed @kognito1 for finding that. Similar to @LightYarn, I am also using the free version of TMP. My project is very simple and only uses a few TMP texts. It seems that the inclusion of the TMP runtime DLL causes the physics module to be included in a WebGL build. I need TMP for dynamic white text to have an outline and drop shadow so that the text is readable on a bright background. This is not very nice to do with Unity's UI.Text.

As a result, 25% of my build size is presumably taken up by the physics references in TMP_SubMesh.cs



Maybe @Stephan_B is able to provide a solution?

 

Has /files.unity3d.com/build-report been replaced by something else on 2018?

 

Build Report Inspector doesn't calculate size of modules for me in 2018.3 ...