Search Issue Tracker

Fixed in 2021.1.X

Duplicate in 2021.3.X

Votes

0

Found in

2019.4

2021.1

2021.2.11f1

2021.3

2022.1

2022.2

Issue ID

1402978

Regression

No

Semaphore.WaitForSignal degrades Editor performance when entering Play Mode

Profiling

-

How to reproduce:
1. Create a new empty project
2. Open the Profiler window (Window -> Analysis -> Profiler)
3. Enter Play Mode
4. Focus the Profiler Window

Expected result: Stable and consistent performance of the Editor
Actual result: Semaphore.WaitForSignal degrades the performance of the Editor

Reproducible with: 2019.4.38f1, 2021.1.21f1, 2021.3.1f1, 2022.1.0f1, 2022.2.0a11
Not Reproducible with: 2020.3.33f1, 2021.1.22f1, 2021.1.28f1

Note:
- Using the VR Template, performance is twice as bad
- Performance of the PlayerLoop in 2021.3 sways between 10.0ms and ~15.0ms
- Performance of the PlayerLoop in 2022.1 is significantly better, but performance is still visibly affected (~5.0ms)
- Performance of the PlayerLoop in 2021.1.28f1 sways between 0.3ms and 3.0ms

  1. Resolution Note (fix version 2021.1):

    Fixed in: 2021.1.22f1

Log in to vote on this issue

Comments (3)

  1. LordCainen

    Jul 20, 2023 13:56

    I am encountering this same performance issue in 2022.3.5 lts as well.

  2. BrianDuffyGames

    Jan 19, 2023 20:10

    Seconding the above comment, what's going on with bug fixes not being carried forward to newer versions?

  3. Charlicopter

    May 08, 2022 21:04

    This bug has crippled my project (I'm on 2021.3 LTS + OpenXR) - Is there a way to get information as to if/when the fixes will come to LTS? I'm not sure I understand why 2021.1 got the fix, but not 2021.3...

Add comment

Log in to post comment

All about bugs

View bugs we have successfully reproduced, and vote for the bugs you want to see fixed most urgently.

Latest issues

See all new issues