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Won't Fix
Votes
4
Found in
2022.2.12f1
2023.1.0b9
2023.2.0a7
Issue ID
UUM-31315
Regression
Yes
Build times are very long when building for WebGL
Reproduction steps:
1. Open the attached "repro_IN-36000SlowBuild.zip" project
2. Open File -> Build Settings
3. Select "WebGL" and press "Build And Run"
4. Wait for the build to finish
Expected result: The build finishes in around 5 minutes
Actual result: The build finishes in around 12 minutes
Reproducible with: 2022.2.0a16, 2022.2.12f1, 2023.1.0b9, 2023.2.0a7
Not reproducible with: 2020.3.46f1, 2021.3.21f1, 2022.2.0a15
Reproducible on: Windows 10, macOS 13.2.1 (M1) (by the reporter)
-
ProGameDevUser
Nov 14, 2023 15:50
"Won't Fix" - Is this a joke???
-
atomikm
Jul 17, 2023 22:37
This issue is still happening on 2022.3.3f1 LTS
Build time used to take a few minutes and now won't complete after 2 hours
Macbook Pro 2021
Unity 2022.3.3f1 -
Nodo42
Jun 12, 2023 12:25
Seems like multithreading is not used on Runtime Speed and Disk Size on Code Optimization, this why it takes so long
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therobby3
Mar 28, 2023 19:54
Also having the issue. Here is some info on my end:
Offhand, I'll provide some quick info I have.
Operating system: Windows 10 Home. OS build: 19045.2728
Processor: Intel i7-7700
Unity Editor version: 2022.2.12
Code optimization setting: Runtime speed
Time taken to complete: Roughly 40 minutes. Was previously in the ballpark of 6 minutes in Unity 2021. -
amateurd
Mar 28, 2023 14:51
"Linking build js.wasm" can take several hours.
Deleting the Library folder and the Temp folder does stop the problem happening, but only for a time on before it comes back. It would be more understandable with old projects but here it happens on a brand new project created in Unity 2022.2.11 containing one scene, one GameObject and one script.
Perhaps we could ask for a feature to be added to Unity so it will delete and rebuild the LIbrary folder before each WebGL build?
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Resolution Note:
Upgrading version of emscripten resulted in longer build times when performing Release builds. Currently unable to identify a regression in build times after that change was made.
If this is impacting you please add a comment on this issue or add additional details in the existing forum thread here: https://forum.unity.com/threads/webgl-build-linking-build-js-wasm-takes-forever.1315203/