Hello.
With an object selected in a complex drawing with floating viewport opened and any other viewport is focused, panning with middle mouse is extremely laggy.
Taskmanager reports only 8% CPU usage, 0% GPU usage in safe mode and 1% CPU, 10%GPU in normal, panning in focused floating viewport brings GPU usage to 15%
Same issue in Rhino 9 BETA, 9.0.26293.12303
System Info
Rhino 8 SR37 2026-10-21 (Rhino 8, 8.37.26294.11001, Git hash:master @ a6592128d921cf5111f81ead500d1035845fda34)
License type: Commercial, build 2026-10-21
License details: Cloud Zoo
Windows 11 (10.0.26300 SR0.0) or greater (Physical RAM: 16GB)
.NET 10.0.8
Computer platform: LAPTOP - Plugged in [100% battery remaining]
Non-hybrid graphics configuration.
Primary display and OpenGL: NVIDIA GeForce RTX 2060 (NVidia) Memory: 6GB, Driver date: 9-30-2026 (M-D-Y). OpenGL Ver: 4.6.0 NVIDIA 617.42
> Integrated accelerated graphics device with 4 adapter port(s)
- Secondary monitor is laptop’s integrated screen or built-in port
- Windows Main Display attached to adapter port 1
Primary OpenGL: NVIDIA GeForce RTX 2060 (NVidia) Memory: 6GB, Driver date: 9-30-2026 (M-D-Y). OpenGL Ver: 4.6.0 NVIDIA 617.42
> Integrated accelerated graphics device with 4 adapter port(s)
- Secondary monitor is laptop’s integrated screen or built-in port
- Windows Main Display attached to adapter port 1
Secondary graphics devices.
Intel(R) UHD Graphics (Intel) Memory: 1GB, Driver date: 6-1-2021 (M-D-Y).
> Integrated graphics device with 3 adapter port(s)
- There are no monitors attached to this device. Laptop lid is probably closed
OpenGL Settings
Safe mode: Off
Use accelerated hardware modes: On
GPU Tessellation is: On
Redraw scene when viewports are exposed: On
Graphics level being used: OpenGL 4.6 (primary GPU’s maximum)
Anti-alias mode: 8x
Mip Map Filtering: Linear
Anisotropic Filtering Mode: High
Vendor Name: NVIDIA Corporation
Render version: 4.6
Shading Language: 4.60 NVIDIA
Driver Date: 9-30-2026
Driver Version: 32.0.16.1742
Maximum Texture size: 32768 x 32768
Z-Buffer depth: 24 bits
Maximum Viewport size: 32768 x 32768
Total Video Memory: 6 GB
Rhino plugins that do not ship with Rhino
D:\github\rhino\vFileTypeTemplate\bin\Release\Rhino8\net7.0-windows\vFileTypeTemplate.dll “vFileTypeTemplate” 26.8.25.1813
D:\github\rhino\vAutoBackup\bin\Release\Rhino8\net7.0-windows\vAutoBackup.dll “vAutoBackup” 26.7.23.1911
D:\github\rhino\vAltGrShortcutFilter\bin\Release\Rhino8\net7.0-windows\vAltGrShortcutFilter.Rhino8.dll “vAltGr Shortcut Filter” 26.10.28.2031
D:\github\rhino\vObjectPropertiesPlus\bin\Release\Rhino8\net7.0-windows\vObjectPropertiesPlus.dll “vObjectProperties+” 26.11.2.1223
D:\github\rhino\vTools\bin\Release\Rhino8\net7.0-windows\vTools.dll “vTools” 26.11.2.1329
D:\github\rhino\vArtful\bin\Release\Rhino8\net7.0-windows\vArtful.dll “vArtful” 26.9.28.1611
Rhino plugins that ship with Rhino
C:\Program Files\Rhino 8\Plug-ins\Commands.rhp “Commands” 8.37.26294.11001
C:\Program Files\Rhino 8\Plug-ins\WebBrowser.rhp “WebBrowser”
C:\Program Files\Rhino 8\Plug-ins\rdk.rhp “Renderer Development Kit”
C:\Program Files\Rhino 8\Plug-ins\RhinoScript.rhp “RhinoScript”
C:\Program Files\Rhino 8\Plug-ins\IdleProcessor.rhp “IdleProcessor”
C:\Program Files\Rhino 8\Plug-ins\RhinoRenderCycles.rhp “Rhino Render” 8.37.26294.11001
C:\Program Files\Rhino 8\Plug-ins\rdk_etoui.rhp “RDK_EtoUI” 8.37.26294.11001
C:\Program Files\Rhino 8\Plug-ins\NamedSnapshots.rhp “Snapshots”
C:\Program Files\Rhino 8\Plug-ins\MeshCommands.rhp “MeshCommands” 8.37.26294.11001
C:\Program Files\Rhino 8\Plug-ins\SectionTools.rhp “SectionTools”
C:\Program Files\Rhino 8\Plug-ins\RhinoCycles.rhp “RhinoCycles” 8.37.26294.11001
C:\Program Files\Rhino 8\Plug-ins\Toolbars\Toolbars.rhp “Toolbars” 8.37.26294.11001
C:\Program Files\Rhino 8\Plug-ins\3dxrhino.rhp “3Dconnexion 3D Mouse”
C:\Program Files\Rhino 8\Plug-ins\Displacement.rhp “Displacement”