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Postponed means that the issue was either a feature request or something that requires major refactoring on our side. Since that makes the issue not actionable in the close future we choose to close it as Postponed and add it on our internal roadmaps and technical debt pages instead.




Found in


Issue ID




High CPU usage and slow editor performance while the Profiler with Deep Profiling is on with no complex scripts



Steps to reproduce:
1. Open the user's submitted project
2. Open scene "DebugScene" under Assets/__Test
3. Open the Profiler with enabled Deep Profile and Play the scene
4. As more text will be instantiated, the editor will slow down and the CPU usage in the Deep Profiler will increase

Expected result: Simple script does not severely increase CPU usage in the Deep Profiler
Actual result: Deep Profiler shows CPU usage very high as more text is instantiated

Reproduced with: 5.6.4f1, 2017.1.2p1, 2017.2.0f3, 2017.3.0b4, 2018.1.0a1

Note: Deep Profiling slows down games if complex scripts are running, but in this case the script only instantiates "text"

  1. Resolution Note (2018.1.X):

    This is somewhat expected. In the 17.1 the UI wasn't tracked properly. We are adding more tracking and debugging around the UI. This is what the user is now seeing. The layout performance goes down slowly as its having to determine where each element fits in a grid every time they add more text.

Comments (3)

  1. Shadowing

    Mar 24, 2018 09:41

    Same Issue as well. Profiler is also unusable for me.
    Unity 2017.3.1 p1

  2. Onsterion

    Mar 18, 2018 00:49

    Same problem here, extreme slow Editor

    Unity Version: 2017.3.1p4

    Hardware / Software System:
    Sistema operativo
    Windows 10 Home 64-bit
    Intel Core i7 7820HK @ 2.90GHz 44 °C
    Kaby Lake 14nm Tecnología
    32.0GB Doble-Canal Desconocido @ 1196MHz (17-17-17-39)
    Generic PnP Monitor (1920x1080@60Hz)
    4095MBNVIDIA GeForce GTX 1070 (MSI) 41 °C
    4095MBNVIDIA GeForce GTX 1070 (MSI) 41 °C
    versión ForceWare: 391.01
    SLI habilitado

  3. Likewizedog

    Dec 01, 2017 13:13

    Same issue. Profiler is unusable. Worked fine in 2017.1

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