This mainly seems to affect macOS and Linux but the CPU use while idle on Windows is a bit high too.
On each of these platforms I have launched the application, connected to a cluster and run a query or two then closed the CQLSH view, then measured the CPU use while the application is idle on the Workspace view:
Windows 10: 15-20%
Windows 11: 7-10% but Windows 11 puts the process into efficiency mode to limit its resource use
Linux: 30-60%
macOS: 30-60%
Given that the application is not doing anything I would not expect it to be using over half a CPU core and affecting the performance of other applications.
This mainly seems to affect macOS and Linux but the CPU use while idle on Windows is a bit high too.
On each of these platforms I have launched the application, connected to a cluster and run a query or two then closed the CQLSH view, then measured the CPU use while the application is idle on the Workspace view:
Windows 10: 15-20% Windows 11: 7-10% but Windows 11 puts the process into efficiency mode to limit its resource use Linux: 30-60% macOS: 30-60%
Given that the application is not doing anything I would not expect it to be using over half a CPU core and affecting the performance of other applications.