1ssuc

I've observed a significant difference in SSH login speed between DietPi and Armbian on Raspberry Pi 4B (headless setup). Environment Raspberry Pi 4B (headless) DietPi (recently installed) Armbian (previously used) Both systems use default settings Observations SSH login to DietPi is consistently faster than Armbian by a few seconds with default settings. Initially suspected MOTD settings, tested files under /etc/update-motd.d/. Discovered that 10-armian-header adds approximately 1 second to login time. Disabled this component but SSH login to Armbian still remained slow. Found related discussion on Raspberry Pi forums: SSH speed limit? Used the following command for testing which revealed significant speed differences: dd if=/dev/zero bs=1K count=1M | ssh localhost 'dd of=/dev/null' and console log root@DietPi:~# dd if=/dev/zero bs=1K count=1M |ssh localhost 'dd of=/dev/null' root@localhost's password: 1048576+0 records in 1048576+0 records out 1073741824 bytes (1.1 GB, 1.0 GiB) copied, 12.9425 s, 83.0 MB/s 2097152+0 records in 2097152+0 records out 1073741824 bytes (1.1 GB, 1.0 GiB) copied, 9.35135 s, 115 MB/s root@DietPi:~# uname -snrvm Linux DietPi 6.12.47+rpt-rpi-v8 #1 SMP PREEMPT Debian 1:6.12.47-1+rpt1 (2025-09-16) aarch64 root@rpi4b1:~# dd if=/dev/zero bs=1K count=1M |ssh localhost 'dd of=/dev/null' root@localhost's password: 1048576+0 records in 1048576+0 records out 1073741824 bytes (1.1 GB, 1.0 GiB) copied, 29.5451 s, 36.3 MB/s 2097152+0 records in 2097152+0 records out 1073741824 bytes (1.1 GB, 1.0 GiB) copied, 20.0137 s, 53.7 MB/s root@rpi4b1:~# uname -snrvm Linux rpi4b1 6.12.19-current-bcm2711 #1 SMP PREEMPT Thu Mar 20 17:34:53 UTC 2025 aarch64 kernel config attachments dietpi: raspberrypi-config-6.12.47+rpt-rpi-v8.zip raspberrypi_proc_crypto.zip armbian on rpi4b: armbian-rpi-config-6.12.19-current-bcm2711.zip armbian_rpi_proc_crypto.zip