Feedback: Apple Configurator restore over DFU at USB 2 speeds on Apple Silicon Macs

FB13555999 — macOS

Basic Information

Please provide a descriptive title for your feedback:
Apple Configurator restore over DFU at USB 2 speeds on Apple Silicon Macs

Which area are you seeing an issue with?
Installation/Setup/Migration/Recovery

What type of issue are you reporting?
Application Slow/Unresponsive

Details

What does the installation/setup/migration/recovery issue you are seeing involve?
Something else not on this list

What build of macOS were you upgrading from?
Apple Silicon in DFU mode

What time was it when this last occurred? (Example: 12:00 pm EST 02/14/2023)
Always at USB 2 speeds

Description

Please describe the issue and what steps we can take to reproduce it:
When using Apple Configurator 2 to restore in DFU mode over USB, restore speeds are USB 2 speeds. Apple Configurator 2 can be used to restore multiple Macs using a USB 3 hub, but Macs in DFU mode negotiate in USB 2 speeds rather than USB 3 speeds. 

To replicate:
1. Install Apple Configurator 2 on a Mac. Plug the DFU USB port to a port on a USB 3 port of a USB 3 hub.
2. Put 5 Apple Silicon Macs into DFU mode using the DFU key presses and attach each Mac's DFU port to a port on the USB 3 hub.
3. Use Apple Configurator 2 to restore all 5 Macs at once using DFU restore.

Expected result: The time to restore should be about USB 3 speeds / the number of Macs.
What actually happened: The time to restore was USB 2 speed / number of Macs.

Using a USB 3 hub diagnostic tool, the hub reported that the downstream ports were negotiated at USB 2 speeds.