Fusion 360 extremely slow with large, imported models

[info7JY2S]

I'm wasting so much time waiting for a "compute" or even adding a dimension line to a sketch while working on a large model. (imported inventor model of a costumer).

I just need to ad a few protective covers and some new small parts, but almost every action I preform costs at least 15 seconds to complete. Adding As-Built (fixed) Joints can even take  minutes to compute. It's driving me nuts!

I rencently bought a new computer (I7 core with 16GB memory and a G-Force 3070 RTX) So computing power should not be the problem here.

What's wrong?

I don't want to simplify the model as this will loose important information

[jeff_strater]

@info7JY2S - can you share the model?  Sometimes there are techniques to make things go faster (eliminate large sketches, use cosmetic threads instead of modeled threads, etc).  I know you say you don't want to simplify the model, but, for instance, do you need all the fasteners modeled?  

[info7JY2S]

I'll send you a private message. Cannot share the model in public

[jeff_strater]

for those who are following this thread:  We found one cause of slowness in this model.  Not sure yet if this is the cause for @info7JY2S .  But, the design was VERY slow on my computer.  Every operation, from view operations to menus, even moving the window around was very slow, and we found that at least one option that was responsible is "Component Color Swatch" on the timeline:

If you disable this option, at least this design will behave much more efficiently.  It is still a big model, and some operations will be slow, but at least some of these basic UI options will be much better.

The same holds true for Component Color Cycling:

[TrippyLighting]

Thanks for sharing that @jeff_strater. Very interesting!

[info7JY2S]

Hello Jeff,

I almost never use color cycling. So although you might have found something slowing fusion down. This is not what's causing it for me.

Can you please try to make an as-built joint between two parts (just fixed) and time how long this takes? 

[jeff_strater]

OK, good to know.  Definitely don't turn color swatches on in this model.  I tested As-Built Joint on this model.  It is about what I expect for a design of this size.  Clicking OK on the joint dialog took about 10 seconds.  Obviously it should be faster, but this does not seem extremely slow to me.