Performance issue when selecting / de-selecting model surface, edge or anything

[mitkus.tadas]

Hello,

For some time now, fusion360 has struggled with a bit larger assemblies only when selecting / de-selecting faces, edges, components, or parts. After choosing a face, let's say, F360 freezes for a sec or two. This issue isn't "enjoyable," and I can't do any "normal" tasks with F360. 

The hardware:

Dell XPS 17" (4k touch display)

CPU: Intel(R) Core(TM) i7-10875H CPU @ 2.30GHz 2.30 GHz

RAM: 32.0 GB

GPU: 2060 maxQ

F360 uses dedicated GPU:

I have tried to disable the High DPI Scaling - no effect (the lag is the same), changing the graphics driver to DX9, OpenGL, DX11, Automatic - does not impact the issue. 

Any ideas on how to solve the issue? 

Here is the short video showing the issue:

<iframe width="240" height="340" src="https://screencast.autodesk.com/Embed/Timeline/0a6714eb-4294-4caa-9a9c-d71bfbbb16c4" frameborder="0" allowfullscreen webkitallowfullscreen></iframe>

[jeff_strater]

here is one thing to try:  I wonder if the lag is caused by "default measure":

turn it off here:

I always disable this feature, because it can slow down selection, and if I want to measure something, I will measure it myself.

[mitkus.tadas]

@jeff_strater, thank you for your suggestion. However, this did not solve the issue. I tried to isolate a small assembly in the same assembly file in my video example - it behaves the same way - lag's a lot. Single component or assembly from 5 parts (as an example) is working great - without any lag. 

[jeff_strater]

thanks, @mitkus.tadas - would you be willing to share the smaller design with us so that we can investigate?  If you are not comfortable posting it here, you can share it with me privately.  Thanks