Burst compilation is taking almost twice longer after upgrading to Burst 1.8.1 and newer

Package: Burst

Fixed

1.8.X

1.8.0 onwards

The reason for the performance regression is that in 1.8.0, when doing a development build, full debug info wouldn't be generated, only line information. That was fixed in 1.8.1, which means the compilation of development builds take longer due to the extra amount of data being worked with. I have added an option in "Player Settings > Burst AOT Settings" called "Debug Information Kind", which defaults to "Full". But users can set this to "Line Only" if they don't need full debug information for their development builds and would instead like the faster compilation.

How to reproduce:
1. Open the attached project “BurstBug”
2. Click Colossal Tools → Build Window
3. Click Build under the Build Settings field
4. Observe the compilation time in the Editor.log by searching “bcl.exe”

Expected result: Compilation time is similar to the compilation time using the older versions
Actual result: Compilation time is taking almost twice the compilation time in older versions

Reproducible with: 1.8.1 (2021.3.15f1, 2022.1.24f1, 2022.2.0b12, 2023.1.0a21), 1.8.2 (2021.3.15f1, 2022.1.24f1, 2022.2.0b12, 2023.1.0a21)
Not reproducible with: 1.8.0 (2021.3.15f1, 2022.1.0f1, 2022.2.0b12, 2023.1.0a21)
Couldn’t test with: Prior to 1.8.0 versions (Building time takes around an hour, which would make testing really long)

Reproducible on: Windows 11 Pro

Burst compilation is taking almost twice longer after upgrading to Burst 1.8.1 and newer

Package: Burst

Fixed

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Burst compilation is taking almost twice longer after upgrading to Burst 1.8.1 and newer

Package: Burst

Statuses

Fixed

Resolution Notes

Description

Prioritise and Follow this issue

Have a workaround or additional info about this issue?