is there a possibility to use Bootchart or any comparable tool to log booting times and services on a CoreOS machine? So far I used 'dmesg' but was hoping to find something more graphic to better compare it to the values of other OS like Ubuntu. Thanks for your help!
Check out systemd-analyze: https://www.freedesktop.org/software/systemd/man/systemd-analyze.html
systemd-analyze may be used to determine system boot-up performance statistics and retrieve other state and tracing information from the system and service manager, and to verify the correctness of unit files.