Long scheduler times on main thread when using InstantiateAsync with a singular massive Prefab

Unity: Scripting Runtime

Fixed

6.3.X

6.2.X

6.1.X

6.0.X

Won't Fix

2022.3.X

2021.3.X

Too risky to backport to such an old and stable LTS

InstantiateAsync was introduced on 2022, nothing to be done on 2021

How to reproduce:
1. Open the attached “IN-98225-AsyncInstantiate6_1.zip“ project in Unity Editor
2. Navigate to Menu Bar > Window > Analysis > Profiler and click on it
3. Enter play mode and open the Profiler Window
4. Click Start Capture and observe the Profiler Graph

Expected result: Processing time keeps spiking up to over 33ms
Actual result: Processing time is inconsistent, usually taking longer than expected.

Reproducible with: 2021.3.50f1, 2022.3.61f1, 6000.0.45f1, 6000.1.0b13, 6000.2.0a8

Reproducible on: MacOS 15.3.2 (M1 MAX)
Not reproducible on: No other environment tested

Note: The bug also persists in builds

Long scheduler times on main thread when using InstantiateAsync with a singular massive Prefab

Unity: Scripting Runtime

Fixed

Won't Fix

Prioritise and Follow this issue

Have a workaround or additional info about this issue?

Long scheduler times on main thread when using InstantiateAsync with a singular massive Prefab

Unity: Scripting Runtime

Statuses

Fixed

Won't Fix

Resolution Notes

2022.3.XWon't FixToo risky to backport to such an old and stable LTS

2021.3.XWon't FixInstantiateAsync was introduced on 2022, nothing to be done on 2021

Description

Prioritise and Follow this issue

Have a workaround or additional info about this issue?