As seen in the video, my SeeMusic is very laggy and basically unusable. Issue wasn't present when using 3.5.1 and 3.6.2 versions, but 3.7 onwards (for those I tested: 3.7,3.8,4) all had this slow lag issue.
I'm running this on a Windows PC, main specs are as follows: CPU: Ryzen 9 5900x
GPU: Gigabyte RTX 3070 Gaming OC
Ram: 32GB DDR4 3600mhz
Storage: AORUS NVMe Gen4 SSD 1TB
Hoping to solve this issue so I can render more stuff :/
Got it.
I can see that you're rendering out in the most recent test at 4K resolution, Best quality, 60 FPS. This is an extremely high resolution, and the speed that you're seeing in the render is actually normal for that setting. Decreasing the resolution to 1080p or 720p will drastically increase the render speed. Changing to 30 FPS will cut the render time in half. If you really need 4K, 60 FPS, you should first do a lower resolution render to check everything, then only render out at 4K 60 FPS when you are ok with leaving the render an hour or two to complete.
2. I've just done more testing on Windows, and am completely unable to replicate a performance difference between the earlier versions and the 4.0 versions - the performance on my computers is identical. I'm not saying that there isn't possibly something happening on your computer - just that it's highly unlikely I'm going to be able to identify or help with what is happening. If something is happening, it is most likely related to something that changed in Unity relating to your specific computer hardware. I unfortunately have absolutely no control over the changes that Unity makes to its framework.
I wish I could be of more help, but unfortunately this is likely all the assistance I can offer at this time. You're welcome to use one of the earlier versions, and I'm always happy to refund and cancel a subscription at any time.
Thank you