> 
> I confess that I have no real evidence on performance differences
> between NTPD and chronyd...
>

I do have some evidence.

chrony works better:

a) ntpd steps the time, some applications do not like that, chrony seems to always adjust time smoothly
b) on some special purpose machines ntpd fails to lock and sync the time (at all - probably
   because of a hardwired limit on maximum permitted time drift), chrony works okey
c) debug and diagnostics information from ntpd is impossible to understand, chronyc reports very well
   who we are locked on, what is the time difference, who's clock is running too fast/too slow,
   how well we are tracking, etc.

-- 
Konstantin Olchanski
Data Acquisition Systems: The Bytes Must Flow!
Email: olchansk-at-triumf-dot-ca
Snail mail: 4004 Wesbrook Mall, TRIUMF, Vancouver, B.C., V6T 2A3, Canada