in reply to
Q: re Proc::ProcessTable
The cache_ttys flag is used internally by Proc::ProcessTable is indicate whether the module should use and create a cache file containing the association between TTY names and device names. This option is intended to speed up the module initialisation process where a file search is performed within the /dev file system for TTY names and device names - See the _get_tty_list method for details.
perl -le "print unpack'N', pack'B32', '00000000000000000000001000000000'"