CAM 3D Parallel Toolpath extremely slow to compile when avoiding surfaces

[Dippeggs]

I have had this problem for months now and I thought it would've been fixed but maybe I'm the only one to notice it. I use the Parallel 3d Toolpath a lot for my work, but for months now I noticed the compile/compute time increased dramatically whenever I choose surfaces to avoid. I make electric guitars so there's a lot of carved surfaces. 

Please look at my attached photos. I have a pretty standard thing i'm carving here (1/2 Ball end mill). Without selecting things to avoid, is takes less than 1 second to compile. However, If I select parts to avoid, It increase to 14 seconds. I used avoid a lot because it saves time rather than selecting the outlines of objects. 

Now the weird part is other 3D toolpaths are nowhere near as slow as the Parallel path. If I use the Scallop toolpath, with everything selected and parts avoided like the parallel, it computes in 1 second/less (in this example) It seems like a problem just for the Parallel path. Unfortunately, I use that 99% of the time for carving. I use a CNC Router and it doesn't like doing the complicated movements like in scallop paths.

This wasn't like this a few months ago. It worked just fine. Some update messed it up but I can't remember which one. I've tried this on 3 different computers and they all do it, just different speeds because of the different cpu's and such. I have much more complicated stuff that takes minutes to compile sometimes, but turning off avoid brings it to seconds.

[seth.madore]

Would you be able to share your Fusion file here?
File > Export > Save to local folder, return to thread and attach the .f3d/.f3z file in your reply.

[Dippeggs]

Here's a file with the model, a setup, and 2 paths both labeled. 1 no avoid and 1 with avoid. Please tell me if you experience the same problem. Or if I exported it wrong.

[seth.madore]

What are your computer specs? I would expect a bit longer of a time, since it needs to run more calculations to avoid those surfaces. On my PC, it took .6 seconds for the first toolpath and 5 seconds for the second:

 

Which, to be honest, doesn't seem unreasonable.