Facter takes a long time to run and you want to know which fact is the culprit.
# present in facter 1.5.9+ $ facter -t ... facterversion: 0.04ms arp: 25.87ms puppetversion: 401.19ms sshrsakey: 0.17ms netmask_lo: 7.05ms ...
There are times, mostly when you are writing your own facts, that
something causes facter or puppet to take a lot longer than you would
normally expect. Running facter with the
-t option will trace each
facts resolution and print how long it takes. This will often be enough
to pinpoint the misbehaving fact and for the real work to begin.