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Votes
0
Found in
2019.3.13f1
2019.4
2020.2
Issue ID
1253762
Regression
No
[DOTS] GetBuffer performance scales with object count in scene
Reproduction steps:
1. Open attached project "ECS_Playground.zip" and scene "SampleScene"
2. Enter Play Mode
3. Observe Entity Debugger Window, "OxygenSingletonSystem's" time
4. In Hierarchy window, select "Enemy Spawner" GameObject
5. In Inspector window, set "Spawn Count" variable to 1000
6. Enter Play Mode
7. Observe Entity Debugger Window, "OxygenSingletonSystem's" time
Expected result: Performance remains the same
Actual result: Performance scales with object count in scene
Reproducible with: 2019.4.6f1 (DOTS 0.6.0-preview, 0.8.2-preview), 2020.1.1f1, 2020.2.0a20 (DOTS 0.9.0-preview.1)
Could not test with: 2018.4.26f1 (DOTS package unavailable), 2019.4.6f1 (DOTS 0.5.1-preview, console errors break project)
Note: Issue reproduces with Burst Compiler enabled
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Resolution Note:
The call to GetBuffer creates a sync point, so the previous job needs to complete before we can actually grab it. The previous job's amount of work was the cause of the appearance of an increase in time.