WebGL builds are completely unusable

I've been sitting here for 25 minutes waiting for "Building native binary with IL2CPP" to finish.
Looking at it with process manager it's sitting at 579.1 MB of ram and no CPU, disk, or network usage.

I previously gave up assuming it hung after asm2wasm.exe climbed above 5GB of ram and hadn't finished yet after 40 minutes of throttling my CPU at 100%

Does anyone know if there's any priority on making this actually usable?
Does anyone with unreal engine experience know if they do WebGL builds any faster? This is going to cripple any productivity and be a complete deal breaker for my current project.

Edit: So I decided to go and sleep while waiting to see if this'll finish and 6 hours later the IL2CPP step is still on my screen.

Edit 2: I have no managed to push out a build in under 10 minutes by setting the colour space back to Gamma and auto graphics API back on. Is linear colour space currently unsupported?

 

I had the same issue at the step that asm2wasm processes the build. I'm using URP & Linear color space in 2020.1.3f (the issue remains in 2020.1.4f as well). Would take about 45 minutes to finish (and asm2wasm.exe ballooned to 5GB+ memory usage as well) for a small gamejam prototype.

The workaround at the moment seem to be to go to Project Settings > Player > Publishing Settings and set Compression Format to Disabled. After switching compression off, builds took less than a minute just expected for my small project. Sometimes the issue returns and honestly it might be a antivirus problem, so check that.

This problem exists even with a fresh project.

 

Anyone know if this problem is solved? I can't really see the point in advertising that Unity builds for WebGL if it takes more than 10 minutes to build an empty scene.

I can't really see how this would work in terms of development? Are you supposed to develop for PC and then switch for WebGL at the end and cross your fingers that it works?

I've just been watching a video by Jonathan Blow where he compiles a million lines of code in less than 10 seconds. Something is going wrong somewhere.

 

The issues I had with 2020.1 were mostly due to some changes with new features they added.

I'm using 2020.2 now and the build times are much snappier as expected.

 

Oh OK. I'm using 2019 LTS. So maybe I'll check that out.

 

On a whim, I tried out a WebGL build in 2021.1's beta with this small project I've been trying out. Didn't touch the WebGL settings at all and this was a project freshly made in 2021.1b using URP with the 2D Renderer.

The first build took about 11 minutes, the 2nd (no script changes) took 50 seconds, and a 3rd (with minor scripting changes) took about 7 minutes. asm2wasm.exe still takes the longest portion of time and balloons up to 5GB+ of memory for some reason, so it'll be wonderful to be able to skip that step entirely~

Decided to try out changing color space to Gamma (along with minor scripting changes again) and the build took just under 7 minutes again. So that doesn't seem to effect build time at all.

For a 5th build, I changed color space back to Linear and the Compression Format to Disabled (from gzip). It built in only 52 seconds, which is perfect for test builds.

 

This would be HUGE for Unity WebGL developers. Looking forward to that, thank you @jukka_j

 

I have been experiencing this as well. Recently i have updated my working computer from a 2011 MAC to a Ryzen 7 3700x Windows machine, believing that it would improve my build times.

But all i got were new problems... The project not only takes longer times to build as it's very unstable, most of the times it gets stuck on "Stripping Assemblies" or "Building native binary with IL2CPP" and i need to terminate unity process and start over... I have already tried changing the stripping level, but didn't change much, it worked at first, but the next day the same thing happened again. If i look at the task manager i can see that the Unity process isn't using any CPU, so i assume something failed and it stopped.

I am using Unity 2020.3.12f1, and building with Gamma Color Space and brotli compression.

 

having similar problems on modtheCube build for junior programmer. Sometimes it builds, often it hangs with asm2wasm.exe hogging cpu time and memory. Using latest LTS 2020 ...