webaake Looked around Github and Aur but couldn't find a fresh version of Bootchart without systemd. Not a big problem just for fun and curiosity. The versions I found was 7-8 years old but if someone can point to newer sources I can compile it myself.
banned_9-26-2021 bootchart2 from Aur seems to work, it produced a graph, it needs busybox, I don't know for all features if it needs systemd or not. Basically it charts in a graph processes from when you start bootchartd2 and when you stop it.