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Fixed in 2020.1

Planned for 2018.4, 2019.2

Fixed in 2019.3

Votes

37

Found in

2018.4

2019.2.0a1

2019.2.1f1

2019.3.0a1

2020.1.0a1

Issue ID

1178300

Regression

Yes

Semaphore.WaitForSignal causes a slow editor when entering Play mode

Shuriken

-

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

  1. Response avatar

    richardkettlewell

    Oct 16, 2019

    We are working on a fix for this.

Comments (15)

  1. 5f4d42d7f60f1d864f67a2f3344bd84f?d=mm

    PhilipKeenanPhilips

    Dec 12, 2019 20:40

    Still have this issue in Unity 2013.3.0f3

  2. 8e7e4ba64229ac23aeeb0222d6b0e603?d=mm

    SebMarello

    Dec 12, 2019 13:40

    Same issue 2019.2.15f1

  3. 4904598048ec5adb262c0bda1ed9bf85?d=mm

    antrikshvatss

    Nov 25, 2019 13:45

    Sir,
    I am getting this issue in unity 2019.3 beta version as well as 2020.1 alpha version

  4. B4b409a8e6199cc7415a9a2de39aca5e?d=mm

    NewMagic-Studio

    Nov 24, 2019 21:20

    Same problem using 2019.2.11 have Semaphore.WaitForSignal inside MeshSkinning.Update using 33% of CPU

  5. 4904598048ec5adb262c0bda1ed9bf85?d=mm

    antrikshvatss

    Nov 23, 2019 15:41

    Is this issue fixed in unity 2019.3.0b11

  6. A72985a7d6dd029c03e832b5d96a7a2f?d=mm

    pixelR

    Nov 12, 2019 10:47

    Is this the same reason why I have WaitForSignal in my Android game on the mobile? Unity 2019.3.0b10 + URP 7.1.2

  7. D0ebd839dcb75b2e883a79f42dd6732d?d=mm

    mushdevstudio

    Nov 09, 2019 20:12

    Same issue with 2019.2.11f1

  8. A9e1508110beb1194d0cba223e8ef066?d=mm

    Hawk0077

    Nov 06, 2019 16:38

    Same issue with 2019.2.11f1

  9. 641673dc68c760f33d0da14bc2e8c9d1?d=mm

    TomiG12

    Nov 06, 2019 13:48

    Same issue, 2019.1.11

  10. 2a3a4f06fe49e48fe15de1fb540975f0?d=mm

    mi427857

    Oct 14, 2019 03:51

    same issue 2019.2.6f1

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