How is the speed to running the ubuntu in SDcard

Hi, Anyone has test the speed between install ubunru on emmc and SD Card? I recently try to reinstall ubuntu into my vim2, Krescue/owowow/EMMC installation, non of them have ubunutu 20.4 anymore, only ubuntu 22.04 available, but it’s not what i need, only USB-Disk/SD image available in

I don’t like this way to install Ubuntu on SD card by concerning itself speed and vim2 board reader speed. if someone know how to test the sd card speed, please let me know, thanks