I noticed that Rhino 8 was quite slow at loading grasshopper files. Files that had taken 20 seconds or so, started to take upto 3 minutes. Then I noticed that when I was previewing a render in V-Ray, the whole Rhino (not V-Ray) interface would start to stutter and redraw continually.
The actual render time of image was snappy, Highest preset, 2K image of 50 parts in about 30 seconds. But in preview, at 1000x1000 on the lowest preset render settings Rhino itself would stutter.
Also it feels like it gets slower and slower. Don’t know if this is linked to a memory leak issue that I saw on another post, but CPU and RAM were at about 25-30%, CUDA / 3D on the GPU was at about 80%.
Hi Ash, please run system info in your Rhino command line and post the results.
Was there any video driver changes or Windows updates? Clean installs of NVIDIA drivers have been needed by some users after windows updates the last few months.
There are a lot of factors here, a small reproducible example would be helpful.
Thanks for getting back to me so quickly. The only things that have changed are that I regularly update my drivers and Rhino. The last time I did renders was about 3-4 months ago, and everything worked smoothly as expected. I found similar problems on my desktop machine too, but not as pronounced. The file that I noticed the problem with was a 17mb 3D model of a phone. Fairly simple geometry, the kind of thing that it would have breezed through previously.
I did a clean install of the NVidia drivers last night and had the same results.
The reason that I asked whether it was only me, is because if this is a known bug in an update, it would save me a lot of time dismantling and testing stuff, which is time I don’t have at the moment. However, if it is an isolated case, do let me know and I’ll keep digging.
I think I’ve got to the bottom of it. The recent Windows update and a Rhino update helped a lot. Then the other factor is, I’m guessing, that the new C# Script components are heavier than the old ones, and since I use quite a lot of them and have updated most of my old components, that seems to have been using more of the system resources than before. The only thing I can’t work out is why that would cause the UI to lag and repeatedly regenerate.