Find total amount of memory used by chromium/chrome

chromium_mem_usage.rb

#!/usr/bin/ruby
# This script will find how much memory is currently be used by Chromium

lines = `ps aux | grep Chromium`.split(/\n/)
total_mem = 0
regex = Regexp.new('^'+("([^\s]+\s+)"*6)+'.*')

lines.each do |line|
  matches = line.match(regex)
  if matches
    total_mem += matches[6].to_i
  end
end
p "Total Mem: #{total_mem/1024}"