I liked this video from a lecture series by Martin Kleppmann (author of the "Data intensive applications" book) on clock synchronisation and NTP: https://www.yo

I liked this video from a lecture series by Martin Kleppmann (author of the "Data intensive applications" book) on clock synchronisation and NTP: https://www.youtube.com/watch?v=mAyW-4LeXZo https://www.youtube.com/watch?v=mAyW-4LeXZo I found especially the last part with some hints on how to correctly measure time passed when doing manual profiling helpful (by not using the wall clock, but the monotonic clock. Probably everybode else knows this, but I didn't :D).