[Unity]: SteamVr HTC Vive weird FPS issue

[Vytek]

Many developer have problem with FPS using SteamVR Plugin for Unity (this problem is now only for HTC controller, etc..) Please see:

https://forum.unity3d.com/threads/steamvr-htc-vive-weird-fps-issue.426904/

[Vytek]

Please read this link: https://forum.unity3d.com/threads/steamvr-htc-vive-weird-fps-issue.426904/#post-2821063

https://steamcommunity.com/app/358720/discussions/0/341537671986065508/

[Vytek]

Copied from: https://steamcommunity.com/app/358720/discussions/0/341537671986065508/

Removing all garbage generation from the SteamVR Unity SDK plugin

Hey everyone,

The Unity plugin missed a few spots where garbage was generated. I managed to fix all the issues and posted them over at the Unity forums. Hopefully the next version generate zero garbage while it does its thing.

Link to the discussion[forum.unity3d.com]

Takeaways include.

Disable "Update Dynamically" on all SteamVR_RenderModel scripts. This will disable button clicks and trigger moves. SteamVR's use of params object[] args generates a new array and thus new garbage. Check the link for more info on the fix. The render loop (which is generated every frame) creates a new WaitForEndOfFrame() object. Instead create a single class at the start and reference that. Check the link for all the details.

The Update Dynamically causes a lot of garbage because it uses a foreach loop on the enumerator. Couldn't figure out how to make that into a for loop. Foreach loops generate garbage in Unity's version of Mono.

Hope that the Unity devs at Valve can fix this for the next release! Took a while to track down these garbage issues but now I am happy to report I get zero generate garbage while running my scene. Weee!

[KellanHiggins]

Hey, original poster over at the Unity forums. Happy to answer any questions about my implementation to remove all the garbage. I think snippets of all the code are on the Unity answer forum page.

Happy to post again here if needed.