Testing with streaming at 1440p@144Hz from a cacyos host vm running sunshine to a cachyos physical client running Moonlight, the moonlight client used:

• 153.2MB RAM
• 2-3% of an i3-N305
• 24Mb/s (3MB/s)
• 15-20% of the iGPU

And none of that changed between running Autodesk Fusion with both a low and high polygon assembly, running a AAA game at 1440p@144Hz, or emulating a switch game at the same resolution and refresh rate.

The application being streamed is irrelevant to the resources used by the client.

Edit: Added GPU utilization.