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Fixed in 2020.1.X
Fixed in 2018.4.X, 2019.3.X
Votes
41
Found in
2018.4
2019.2.0a1
2019.2.1f1
2019.3.0a1
2020.1.0a1
Issue ID
1178300
Regression
Yes
Semaphore.WaitForSignal under Canvas.BuildBatch causes a slow editor in Play mode
Steps to reproduce:
1. Open the attached project "Temp Project" from the ownCloud link
2. Open "Main Scene"
3. Turn on the Profiler window
4. Enter Play mode
5. Notice the Spikes from Semaphore.WaitForSignal
Expected results: Semaphore.WaitForSignal does not cause spikes in the Profiler window and making Editor slow
Actual results: Semaphore.WaitForSignal causes spikes in the Profiler window and makes Editor slow
Reproducible with: 2019.2.3f1, 2019.3.0b1, 2020.1.0a1
Note: 2019.1 breaks the project and its packages
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F_o
Jan 02, 2021 13:05
I am still experiencing this issue in 20.1.3f1
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Arcadian-Unity
Oct 19, 2020 12:58
Not fixed, 2019.4.10f1
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KingLlama
Aug 19, 2020 07:00
This is still broken for unity 2019.4.0f1.
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Al3xBRB
Aug 10, 2020 08:27
Not fixed in 2019.4.0f1.
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TsdTeam
Jul 23, 2020 09:10
Not fixed in 2019.4.4f1
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BrettCroomo
May 26, 2020 10:36
Still having this issue in 2019.3.13f using near empty scene in HDRP 7.3..
Base line is 14.5ms then will eventuially spike to 76.6ms. Spike repeats every few seconds.
Seems to align with "CreateCommittedResourceWithTag" under "BufferD3D12.InitializeResource" on the render thread. -
UDN_6c8b8a3a-8d7a-436e-9ca9-a1bf7a57bf0c
May 10, 2020 05:00
2020.1.0a25 also has the issue.
In my simple project, iphone6 and android has no issue,but my iphone11 pro max has the issue. -
UDN_6c8b8a3a-8d7a-436e-9ca9-a1bf7a57bf0c
May 10, 2020 04:30
2019.3.7f1 already has the issue.
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PyramidGames
Apr 28, 2020 10:37
2019.3.7f1 still no fixed
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RedVonix
Apr 08, 2020 01:09
Reproduced in 2019.3.7f1
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richardkettlewell
Oct 16, 2019
We are working on a fix for this.