ChuckO

r1.9.3 ~/workarea/take_a_bm $ ruby take_a_bm.rb 
Thread.current.object_id:70331712734240   0.000000   0.000000   0.000000 (  1.001500)
Thread.current.object_id:70331712733480   0.000000   0.000000   0.000000 (  1.001537)
Thread.current.object_id:70331712733240   0.000000   0.000000   0.000000 (  1.001746)
Thread.current.object_id:70331712732600   0.000000   0.000000   0.000000 (  1.001865)
Thread.current.object_id:70331712731560   0.000000   0.000000   0.000000 (  1.002109)
Thread.current.object_id:70331712733660   0.000000   0.000000   0.000000 (  1.000823)
Thread.current.object_id:70331712733400   0.000000   0.000000   0.000000 (  1.002661)
Thread.current.object_id:70331712733000   0.000000   0.000000   0.000000 (  1.002736)
Thread.current.object_id:70331712729480   0.000000   0.000000   0.000000 (  1.002143)

ChuckO

#!/usr/bin/env ruby
require 'digest/md5'

# argument processing -- goes through Dir[], so can use '**/*' etc.
ARGV[0] ||= '.'

# build list of filenames, rejecting symlink, dirs & 0 len files
filenames = ARGV.collect{ |dir| Dir[File.directory?(dir) ? "#{dir}/*" : dir] }.flatten
filenames.reject!{ |fn| File.symlink?(fn) || File.directory?(fn) || File.size?(fn).nil? }