First of all, many many thanks for making Debian work on a Raspberry Pi 4B. I bounce back and forth between Bullseye and Bookworm on a Pi 4B and have noticed a performance degradation with Bookworm.
TL;DR Install (current) Bookworm - performance good. apt update/upgrade - performance tanks. Revert 5.16 to 5.15 kernel - no improvement. It seems that one of the 103 packages that get installed during the update causes this to happen. More detail at https://github.com/HankB/Pi-4B-bookworm-performance Is there anything I can do to help track this down? (I hope the answer is not "install the packages one at a time to see what causes this.") Thanks! -- Beautiful Sunny Winfield
