Fusion crashing often and taking minutes to update

[MozartII]

Hi, 

I am having issues with fusion taking sometimes up to 10 minutes updating the part when I do simple tweaks in the design history.

I've experienced this also in other, more complex models and the relationship between model complexity and update time does not always seem to fit.

My current project is a surfboard honeycomb structure with many extrusions and boolean operations. It works so far, but every time I do changes backwards in the design history, it takes up to 15 minutes to update the part. This makes the workflow extremely time consuming and frustrating. Is there any known reason behind this behavior?

My PC specs:

CPU: i7 9700k @3.6GHz

GPU: Nvidia RTX 2080 Ti

RAM: 32Gb

[TrippyLighting]

Can you share one of those models in .f3d format?

[MozartII]

Hmm, the file exceeds the allowed size of 71 MB. I wonder why it's over 300 MB now. Maybe that's why it's so slow

[MozartII]

https://we.tl/t-YoS3O6eSkg 

I uploaded a former Version of it, I hope you can open it

[TrippyLighting]

I haven't seen any crashing, but you are using very geometry intensive operations on complex geometry. That takes a while for the geometric modeling kernel to process.

A fillet on 280 curved edges simply takes a while to compute! You do that a few times in succession, so any change you make to features before these operations will take a while to process. 

I'll have to check if a reordering of modeling operations is possible. Moving "expensive" operations to the end of the timeline can help.

[jacob.weinstock]

Thanks @MozartII you for this post. First of all really cool dataset you are working on! Secondly, yes as @TrippyLighting said the modelling operations you are using are resource intensive and complex for fusion to calculate. There is a text command (fusion.dumpfeaturesbycomputetime) that can tell us which features are taking the longest to calculate. Using this, the three highest are the combine operations that are attached in the screenshot. If possible, I would recommend trying to remodel using a different technique that avoids these combines. Also if possible can I report a bug and attach your dataset so our dev teams can work to optimize these types of operations in Fusion? Thanks again for reporting and sorry I couldnt give a simple fix.

[MozartII]

Thanks @TrippyLighting and @jacob.weinstock for the input thoughts and your suggestions, I will try them out on the next version. 
@jacob.weinstock Sure, I'm okay with you sending my dataset.