puppetlabs/facter — pull request #739 by dvorak (2014-07-30 18:10:42+00:00)
Title: (FACT-635) Ignore tap interfaces on Linux

This fixes a problem where on systems with a very large number of tap
interfaces, facter can easily take over an hour to complete running. If fixes
this by ignoring all tap interfaces, since they're generally created
automatically by some sort of networking daemon (Open vSwitch for example), and
it's unlikely anyone is interested in facts on them.