active_support_test.rb

# $ ruby -Ilib active_support_test.rb
# ActiveSupport eating 2214 KB, loaded in 92 ms

require 'rubygems'

unless ENV['stdlib']
  %w( active_support/vendor English base64 benchmark bigdecimal blankslate
      builder cgi date date/format digest/md5 drb enumerator fast_xs fcntl
      fileutils iconv kconv logger memcache mocha monitor openssl pathname
      rational rexml/document securerandom set singleton stringio strscan
      tempfile test/unit/error test/unit/testcase thread time tmpdir tzinfo
      xmlsimple yaml ).each { |f| require f }
end

GC.enable_stats
GC.start
before = GC.allocated_size

elapsed = Benchmark.realtime { require 'active_support' }

GC.start
after = GC.allocated_size

puts "ActiveSupport eating %d KB, loaded in %d ms" % [(after - before) / 1024.0, elapsed * 1000]