gem_checker.rb

#!/usr/bin/env ruby
# copy to /usr/bin/gem-checker 
lib = ARG[0]  
require 'rubygems'
time_before = Time.now
memory_usage_before = `ps -o rss= -p #{Process.pid}`.to_i
require lib
time_after = Time.now
memory_usage_after = `ps -o rss= -p #{Process.pid}`.to_i
time_taken = time_after - time_before
memory_usage = memory_usage_after - memory_usage_before
puts "#{lib} eating #{memory_usage}kb, loaded in #{time_taken}s"