Why does Fusion recalculate every instance multiple times with Duplicating with Joints?

[Artur_Marini]

Hi,

My team and I are currently working on a model with 1500+ components, expected to have around 2000+ (which isn’t that large after all). I’m aware of Fusion's issue with large assemblies, and I expected some slowdown in the process, but even then, I realized something isn’t right.

At this stage of our development, we're placing fasteners, and we thought the recently added "Duplicate with Joints" feature would save us a lot of work. However, what we’re seeing is that, in many cases, it's actually slowing us down.

It seems that every time I place a new instance, Fusion re-computes all the previous instances within the same command. For example, when I snap the 7th instance, it recalculates instances 1 through 6. When I snap the 8th instance, it recalculates instances 1 through 7, and so on. If that wasn’t enough, when I click OK to close the command, it recalculates everything again, but this time it’s placing the joints.

Why is this happening? Is there some hidden option that I’m not aware of?

PS: I noticed that the attached video is not playing correclty, maybe it will if you download and execute it with your media player. Any ways, I'll place another video showing the same problem below.

Vídeo attached

SPECS

Windows 11 Home
Processor: AMD Ryzen 7 7735HS with Radeon Graphics 3.20 GHz

RAM: 16.0 GB (15.2 GB usable)

GPU: NVIDIA GeForce RTX 4050 Laptop

[TrippyLighting]

Without seeing the assembly, it is difficult to answer or recommend strategies.

Edit: I've reposted this on the Fusion Slack channel to get some exposure. The Fusion team is working hard on assembly performance and is usually very interested in this feedback!

Thanks for reporting!

[jacob.weinstock]

Thank you @TrippyLighting for tagging me in. @Artur_Marini Sorry about this annoying behaviour, and thank you for recording a video. As Trippy Lighting said, we are really focussing on these types of datasets in Fusion this year. I will create a bug report for this behaviour using the video you provided. I know the developers will want to analyse this model to optimize the behaviour of Fusion with joints, so if possible can you export the assembly and send it to me? Feel free to directly email me at jacob.weinstock@autodesk.com.