Feedback [PSA] Close package manager if experiencing inexplicable editor lag and pauses

Just spent the evening trying to bisect why my project had become so sluggish to deal with in Unity, with any code change leading to about 15seconds of the editor being hung doing something synchronously blocking the UI.

After incrementally deleting everything in my project until I basically had a pristine scene with one script it was still hanging and the only thing left to do was to factory reset the layout of the editor!

It turned out that just because I had docked the package manager, then I would see the editor pausing whenever it had to recompile scripts.

I can also reproduce this by creating a new project (2019.2.8f1 or 2019.2.3f1) and adding a boilerplate script to an empty. If I modify the script without the package manager open it just takes a moment to recognise and re-compile vs if I open the package manager then it takes about eight seconds. (and presumably it takes longer in my other project since I have installed more packages)

Something is apparently triggering the package manager to also check for updated package (the status bar says 'Loading packages...') every time scripts are recompiled and that's blocking the main thread for a long time (at least on my machine).

Curious to know if anyone else is seeing this, and if not I wonder why. Hopefully someone at Unity can find a way to make whatever the package manager does here happen asynchronously?

Regards

 

I also want to add that this is a huge issue, especially for the people (like us) that are fully endorsing the package manager and trying to create our own packages. Your best users!

 

@BobTheMinion01 @okcompute_unity would be great if you can comment here.

 

Yep; I'm seeing this with 2019.2.3f1 and 2019.2.8f1.

Regards,
- Robert