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Fixed in 2021.1.X



Found in




Issue ID




Memory usage of Logging remains high when the error messages in the Console are cleared



How to reproduce:
1. Open the attached project ""
2. Open the "Test" Scene
3. In the Profiler window enable "Profile Editor", select memory module, switch to "Detailed" mode and click "Take Sample Editor"
4. Enter the Play Mode
5. Wait for 1-2 minutes and click "Take Sample Editor" again
6. Pause the Play Mode, clear the Console window (by clicking "Clear") and click "Take Sample Editor" again

Expected result: after clearing the Console, memory usage of Logging (Other > Logging) dropped to the one seen in 3-rd step
Actual result: after clearing the Console, memory usage dropped a bit but remained high (~30MB)

Reproducible with: 2018.4.26f1, 2019.4.6f1, 2020.1.0f1, 2020.2.0a19

- The more memory is used by the Logging before clearing the Console the more of it is left after clearing (as an example if ~1.5GB memory is used before the Console is cleared, ~400MB will still be used after clearing)
- Tested and reproduced on Windows and MacOS

  1. Resolution Note (fix version 2021.1):

    Clearing the editor console will now properly release memory that it had allocated to display messages. The issue has been fixed and should no longer reproduce in Unity 2021.1.0a6 and above.

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