Search Issue Tracker


Fixed in 2020.3.39f1



Found in


Issue ID




[Performance Regression] GameObject.ActivateAwakeRecursively noticeably slower when rendering trees on terrain



Reproduction steps:
1. Open the attached project ("")
2. Open "Scene"
3. Enter Play mode

Expected result: Terrain GameObjects are redisplayed at the same speed as before
Actual result: Terrain GameObjects are redisplayed noticeably slower than before

Reproducible with: 2019.3.0a9, 2019.3.6f1, 2020.1.0b2, 2020.2.0a4
Not reproducible with: 2017.4.38f1, 2018.4.19f1, 2019.3.0a8

- In this scenario, there are 7 terrains which are all being setActive(true) in an IEnumerator that is used as a coroutine
- The trees used on the terrain are the Broadleaf_Mobile from Standard Assets
- In the versions deemed not reproducible the same action would take 15-30ms, while in the versions deemed reproducible it would take 500-1000ms

  1. Resolution Note (fix version 2020.3.39f1):

    Fixed in 2020.3.40. (The dropdown was missing the value for 2020.3.40f1)

Add comment

Log in to post comment

All about bugs

View bugs we have successfully reproduced, and vote for the bugs you want to see fixed most urgently.