## Link to GitHub Issue or related Pull Request, if one exists
n/a
## Description of change
- Replace unnecessary precision timers with standard sleeps to reduce
wakeups and background CPU usage.
- Reuse buffers in raw input, touchscreen, and HID output paths to
eliminate steady-state allocations.
- Pre-index HID button groups and correctly process batched HID reports.
No functional changes.
## Testing
bicarusandGitHub
5cabd026ae