Mixedrealitytoolkit-unity: Windows Speech causing massive slowdown on startup/shutdown

[StephenHodgson]

Does this affect the legacy HoloToolkit (master) or the Mixed Reality Toolkit (mrtk_release)?
Mixed Reality Toolkit

Describe the bug
When playing in the editor the Windows Speech Recognizer causes massive slowdowns on both startup and shutdown.

To Reproduce
Steps to reproduce the behavior:

1. Open any scene
2. Enter playmode
3. Lags for a few seconds up to 10+ seconds.
4. Same lag when exiting play mode as well.

Stabilization Branch

[ivan2007]

Maybe this issue is related to #2085

[StephenHodgson]

Yup. Sounds pretty much exactly the same.

Wondering if it's a regression? 🤔

[StephenHodgson]

I'm wondering if it's the app trying to obtain the permissions for usage? 🤔

[StephenHodgson]

Dictation is also affected.

[davidkline-ms]

Dictation is also affected.

If it is a permissions related issue, this would be expected...

[davidkline-ms]

Enter playmode

Is there a noticeable slowdown when running a compiled version of the app? Could this be editor specific?

[StephenHodgson]

Is there a noticeable slowdown when running a compiled version of the app?

None that I could find. Likely editor specific?

[davidkline-ms]

None that I could find. Likely editor specific.

Thanks for checking.

[ivan2007]

Hi,
regarding #2085 I was contacted by Microsoft (Eiden Kim).
After providing a complete report of the problem, the final answer was this:

Hi Ivan,
The problem had been well introduced to our dev team and we started working to fix the issue. Thanks for your detail helpful information you provided to us!
Please check the issue from our next MRTK release and let us know if you still see the problem.