Poor Physics performance after updating to Unity 6

Hi,

Not sure if it’s a setting somewhere that we’ve missed or something similar but our physics frame time is spiking upwards of 15ms at times. This has only been an issue since updating to Unity 6. In 2022.3.47f1, we had spikes no larger than 1.66ms when testing.

The only thing that has changed has been the upgrade to unity 6.

I’m unable to find other reports of this on the Unity Discord or the forums; is it something we’ve set wrong or is this a bug?

Just bumping this topic as it’s still an ongoing issue.

I see the right has a different category. not an expert but one the left it updates physics bodies on the right it sends events.

is this a change in how unity does this physics loop or your setup is different (maybe some event related option set on doing something)

how is your project set up? you have upgraded or is a out of scratch test project?

It’s a change to the physics system in Unity 6. The project was ported to Unity 6 but I have also tried downporting it to the previous version we used (with no changes) which is where those screenshots are from. This was noticed by our lead programmer after updating to Unity 6.

when you port the project to a new version you can never be sure that “new” options will be added to the correct setting. off course if the “new” options are hidden inside unity you can’t do nothing. I have no idea if this “sending events” was in the previous versions so I can’t help

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