Search Issue Tracker

Fixed in 2021.1.X

Votes

10

Found in

2019.4

2020.1

2020.2

2020.2.0a21

Issue ID

1272396

Regression

No

[CompilationPipeline] Project recompile and package changes takes a long time when Project includes a lot of packages

Scripting

-

Reproduction steps:
1. Open the user's attached project, or add attached "manifest.json" file to an empty project
2. Open Window > Analysis > Editor Iteration Profiler
3. Select "Enable" in Editor Iteration Profiler
4. Open Window > Analysis > Compilation Timeline
5. Press "Recompile", this just does a full recompile using CompilationPipeline.RequestScriptCompilation API

Expected result: Recompilation takes less than a minute
Actual result: Logged recompilation takes around a minute after that Editor becomes unresponsive for ~3-4 minutes while maintaining extremely high CPU and RAM usage (~80-90%)

Reproducible with: 2019.4.9f1, 2020.1.4f1, 2020.2.0b1
Couldn't test with: 2018.4 (errors after downgrade)

Note:
1. Using attached "manifest-2019.4.json", Editor freezes upon launch, takes all RAM memory, and needs to be ended using Task Manager - this issue is reported separately as case 1273659
2. Repro project doesn't have any assets but includes a lot of Unity Packages

  1. Resolution Note (fix version 2021.1):

    Fixed in 2021.1.0a7

Log in to vote on this issue

Comments (2)

  1. CodePoKE

    Sep 10, 2021 13:08

    For those affected by this, we are currently doing all package management through the manifest outside Unity, which avoids this bug. (2020.3.x LTS)

    Compilation times are egregious (>4 minutes on simple projects).

  2. ELenDiL_Unity

    Sep 18, 2020 02:23

    It also affects third party packages.
    Very slow, Import a package like peek takes 40 mins to finish.

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.

Latest issues

See all new issues