The bring-up instrumentation drew two big 7-segment digits per code zone from hot paths (board.c, serial_msm_geni.c, clk-uclass.c, clock-qcom.c), firing dozens of times per second and slowing the boot noticeably. Drop it and draw a 0-100% progress bar instead: rtwo_boot_progress_step() once per initcall entry, rtwo_boot_progress_done() at the end of the boot. The kalama-gcc-v2 GCC compatible fix from the previous commit stays. This is the tree built with ~/pmos/uboot-chainload/build-uboot.sh (patches/0001-rtwo-fixes-and-boot-progress-bar.patch) that produces the u-boot-nodtb.bin currently running on the phone. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01DnHwDU5yL8L6qgPEN5CV5m