Asset Import / Refresh performance got worse?

Hi all,

when I open my project with the 2017.2.0b11 beta it seems to run fine, however whenever the system triggers an asset import refresh, the refresh takes about 4-5 minutes during which I can't use Unity. In Unity 5.6.0p4 the same refresh is done within 2-5 seconds, it was noticeable, but not that much of a deal.
I can switch automatic refreshes off in the preferences, but even then it seems unity itself triggers a refresh here and there and I can barely work with the new version since it always might freeze inbetween for a couple of minutes.

Did anyone else notice a similiar issue with the asset refresh?

The project folder is 27.5 GB over 340.000 files in 1600 folders, could this be the cause of the problem? I did not look into possible ways to reduce the size yet since it did not cause me much problems in 5.6.0p4.

 

One additional note to what @LeonhardP wrote... do not try to submit a 30gb project with the Unity Bug Reporter Tool, it won't work.

Submit a Bug Report without the project and ask QA to provide a secure location where you can upload your project. QA usually provides an owncloud location on their Unity servers which is password protected.

 

Thanks for the replies, I will try to reproduce the problem with one of the available unity example projects so that I can use those for submitting the bug report. If it only shows up in my own project, I will do as Peter77 suggested.

 

After some testing with the survival shooter example in both versions I noticed that the asset refresh does indeed take a bit longer in the newer Unity version:

2017.2.0b11:

Refresh: detecting if any assets need to be imported or removed ... Refresh: elapses 0.029341 seconds (Nothing changed)

5.6.0p4:

Refresh: detecting if any assets need to be imported or removed ... Refresh: elapses 0.006068 seconds (Nothing changed)

So the asset refresh takes roughly 5 times longer in the newer version, which is barely noticeable in the shooter example project, but scales up accordingly in my large 30 GB project. However I also found out that the "4-5 minute" refresh I was writing about in my original post was mostly caused by me running another game in the background while using Unity, which apparently influences the refresh duration far more than I was aware.

I think this barely qualifies as bug since it is expected that the asset import / refresh will take longer when there is additional functionality in a newer version of Unity. Also there are probably numerous ways how I could reduce the filesize / file count in my project to bring down the duration of the refresh from my side. I opened a case for it nevertheless so the team can check if the increased duration of the refresh is "in order / as expected" due to new functionality in Unity or if it is something that can be improved upon. Case number is 952185.