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Fixed in 2020.1

Planned for 2018.4, 2019.2

Fixed in 2019.3

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

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 (22)

  1. 75a7bee4bd2d3f58e9aca6747d62edc3?d=mm

    Cec

    Jan 16, 2020 10:06

    Still not fiixed in 2019.3.0f5

  2. 4b6801fbee2689f67bcf3ab3086c300d?d=mm

    Liviuss

    Jan 13, 2020 20:51

    I confirm, it's not fixed in 2019.3.0f3.

  3. 49d76b6035b403e1e7a34fe7ec8de79f?d=mm

    Rodolfo-Rubens

    Dec 27, 2019 17:55

    Not fixed in 2019.3.0f3.

  4. A154416be96c4b1abbe483d4983c435a?d=mm

    Dimonasdf

    Dec 25, 2019 15:43

    2019.2.17 stiil has this issue

  5. 4acb018505ba013061f1415d546c4fce?d=mm

    TheAnubis

    Dec 22, 2019 11:01

    It happens to me in Unity 2019.3.03f as well

  6. 1aa253ede4b410f88dfdd6d9762df526?d=mm

    hawkigamer

    Dec 20, 2019 22:02

    Found in unity 2019.3.0f3

  7. E105d5bc57d78c542a8453c916ba3138?d=mm

    KingVario

    Dec 13, 2019 14:09

    Same issue here 2019.3.0f3 Windows 10 and Android 9 reproduces this error when building game standalone for windows or android with autoconnect profiler.
    Inside editor the Semaphore high MS does not appear when profiling only when i build external development build.
    This Semaphore severely skews other profiler data.

    https://i.postimg.cc/T3vR3TtS/Capture.jpg

  8. 5f4d42d7f60f1d864f67a2f3344bd84f?d=mm

    PhilipKeenanPhilips

    Dec 12, 2019 20:40

    Still have this issue in Unity 2013.3.0f3

  9. 8e7e4ba64229ac23aeeb0222d6b0e603?d=mm

    SebMarello

    Dec 12, 2019 13:40

    Same issue 2019.2.15f1

  10. 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

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