kwatch/bench_cgi.rb

## bench_cgi.rb
###
### benchmark to measure cgi program
###

require 'rubygems'
require 'benchmarker'


def cgi_file(file_name, content)
  File.open(file_name, 'wb') do |f|
    f.write(content)
  end
  File.chmod(0755, file_name)
end

cgi_file "hello1.cgi", <<'END'
#!/usr/bin/env ruby
print "Content-Type: text/html\r\n"
print "\r\n"
print "Hello"
END

cgi_file "hello2.cgi", <<'END'
#!/usr/bin/env ruby
require "cgi"
print "Content-Type: text/html\r\n"
print "\r\n"
print "Hello"
END

cgi_file "hello3.cgi", <<'END'
#!/usr/bin/env ruby
require "cgi"
cgi = CGI.new
print cgi.header
print "Hello"
END

cgi_file "hello4.cgi", <<'END'
#!/usr/bin/env ruby
require "cgi"
require "cgi/session"
cgi = CGI.new
print cgi.header
print "Hello"
END

env_cgi_content = <<'END'
#!/usr/bin/env ruby
require 'cgi'
#require 'cgi/session'
cgi = CGI.new
print cgi.header
title = "Environment Variables"
print "<html>\n"
print "  <body>\n"
print "    <h1>#{title}</h1>\n"
print "    <table>\n"
odd = false
ENV.each do |k, v|
  odd = ! odd
  print "      <tr class=\"#{odd ? 'odd' : 'even'}\">\n"
  print "        <td>#{k}</td><td>#{v}</td>\n"
  print "      </tr>\n"
end
print "    </table>\n"
print "  </body>\n"
print "</html>\n"
END

cgi_file "env1.cgi", env_cgi_content
cgi_file "env2.cgi", env_cgi_content.sub(/^#require/, 'require')

cgi_file "nil.cgi", <<'END'
#!/usr/bin/env ruby
nil
END


ENV['REQUEST_METHOD'] = 'GET'
ENV['REQUEST_URI']    = '/hello.cgi'
ENV['QUERY_STRING']   = ''


loop = 1000
#Benchmarker.new(:width=>24, :cycle=>5, :extra=>1) do |bm|
Benchmarker.new(:width=>24, :loop=>loop) do |bm|

  bm.empty_task do
    #loop.times { nil }
    nil
  end

  (1..4).each do |n|
    bm.task("hello#{n}.cgi") do
      #loop.times { system("./hello#{n}.cgi > /dev/null") }
      system("./hello#{n}.cgi > /dev/null")
    end
  end

  (1..2).each do |n|
    bm.task("env#{n}.cgi") do
      #loop.times { system("./env#{n}.cgi > /dev/null") }
      system("./env#{n}.cgi > /dev/null")
    end
  end

  flag = true
  #flag = false
  if flag
    bm.task("nil.cgi > /dev/null") do
      #loop.times { system("./nil.cgi > /dev/null") }
      system("./nil.cgi > /dev/null")
    end
    bm.task("nil.cgi") do
      #loop.times { system("./nil.cgi") }
      system("./nil.cgi")
    end
  end

end

__END__

# benchmarker.rb:   release 0.0.0
# RUBY_VERSION:     1.8.7
# RUBY_PATCHLEVEL:  334
# RUBY_PLATFORM:    i686-darwin10.6.0
#
# ##                            user       sys     total      real
# (Empty)                     0.0000    0.0000    0.0000    0.0006
# hello1.cgi                  0.0600    0.4800    0.5400   11.4261
# hello2.cgi                  0.0600    0.4600    0.5200   22.5066
# hello3.cgi                  0.0600    0.4900    0.5500   22.6741
# hello4.cgi                  0.0600    0.4400    0.5000   35.5769
# env1.cgi                    0.0700    0.4700    0.5400   23.0187
# env2.cgi                    0.0700    0.4500    0.5200   35.7513
# nil.cgi > /dev/null         0.0500    0.5300    0.5800   11.3228  (A)
# nil.cgi                     0.0500    0.5300    0.5800    7.5846  (B)
#
# (A) 11.3228 - (B) 7.5846 = 3.7382
#
# ##                   real
# hello1.cgi        11.4261 - 3.7382 =  7.6879   # require nothing
# hello2.cgi        22.5066 - 3.7382 = 18.7684   # require 'cgi'
# hello3.cgi        22.6741 - 3.7382 = 18.9359   # require 'cgi'; cgi = CGI.new
# hello4.cgi        35.5769 - 3.7382 = 31.8387   # require 'cgi' & 'cgi/session'
# env1.cgi          23.0187 - 3.7382 = 19.2805   # hello3.cgi + html
# env2.cgi          35.7513 - 3.7382 = 32.0131   # hello4.cgi + html
#
#
# process invocation:      7.5846 (= (B))
# print statements:        0.1033 (=  7.6879 -  7.5846)
# require 'cgi':          11.0805 (= 18.7684 -  7.6879)
# cgi = CGI.new:           0.1675 (= 18.9359 - 18.7684)
# require 'cgi/session':  12.9028 (= 35.5769 - 22.6741)
# render html:             0.3446 (= 19.2805 - 18.9359)
#
# percentage:
#   process invocation:    39.34 % (= 100 *  7.5846 / 19.2805)
#   require 'cgi':         57.47 % (= 100 * 11.0805 / 19.2805)
#   cgi = CGI.new:          0.87 % (= 100 *  0.1675 / 19.2805)
#   print statements:       0.54 % (= 100 *  0.1033 / 19.2805)
#   render html:            1.79 % (= 100 *  0.3446 / 19.2805)
	###
	### benchmark to measure cgi program
	###

	require 'rubygems'
	require 'benchmarker'


	def cgi_file(file_name, content)
	File.open(file_name, 'wb') do \|f\|
	f.write(content)
	end
	File.chmod(0755, file_name)
	end

	cgi_file "hello1.cgi", <<'END'
	#!/usr/bin/env ruby
	print "Content-Type: text/html\r\n"
	print "\r\n"
	print "Hello"
	END

	cgi_file "hello2.cgi", <<'END'
	#!/usr/bin/env ruby
	require "cgi"
	print "Content-Type: text/html\r\n"
	print "\r\n"
	print "Hello"
	END

	cgi_file "hello3.cgi", <<'END'
	#!/usr/bin/env ruby
	require "cgi"
	cgi = CGI.new
	print cgi.header
	print "Hello"
	END

	cgi_file "hello4.cgi", <<'END'
	#!/usr/bin/env ruby
	require "cgi"
	require "cgi/session"
	cgi = CGI.new
	print cgi.header
	print "Hello"
	END

	env_cgi_content = <<'END'
	#!/usr/bin/env ruby
	require 'cgi'
	#require 'cgi/session'
	cgi = CGI.new
	print cgi.header
	title = "Environment Variables"
	print "<html>\n"
	print " <body>\n"
	print " <h1>#{title}</h1>\n"
	print " <table>\n"
	odd = false
	ENV.each do \|k, v\|
	odd = ! odd
	print " <tr class=\"#{odd ? 'odd' : 'even'}\">\n"
	print " <td>#{k}</td><td>#{v}</td>\n"
	print " </tr>\n"
	end
	print " </table>\n"
	print " </body>\n"
	print "</html>\n"
	END

	cgi_file "env1.cgi", env_cgi_content
	cgi_file "env2.cgi", env_cgi_content.sub(/^#require/, 'require')

	cgi_file "nil.cgi", <<'END'
	#!/usr/bin/env ruby
	nil
	END


	ENV['REQUEST_METHOD'] = 'GET'
	ENV['REQUEST_URI'] = '/hello.cgi'
	ENV['QUERY_STRING'] = ''


	loop = 1000
	#Benchmarker.new(:width=>24, :cycle=>5, :extra=>1) do \|bm\|
	Benchmarker.new(:width=>24, :loop=>loop) do \|bm\|

	bm.empty_task do
	#loop.times { nil }
	nil
	end

	(1..4).each do \|n\|
	bm.task("hello#{n}.cgi") do
	#loop.times { system("./hello#{n}.cgi > /dev/null") }
	system("./hello#{n}.cgi > /dev/null")
	end
	end

	(1..2).each do \|n\|
	bm.task("env#{n}.cgi") do
	#loop.times { system("./env#{n}.cgi > /dev/null") }
	system("./env#{n}.cgi > /dev/null")
	end
	end

	flag = true
	#flag = false
	if flag
	bm.task("nil.cgi > /dev/null") do
	#loop.times { system("./nil.cgi > /dev/null") }
	system("./nil.cgi > /dev/null")
	end
	bm.task("nil.cgi") do
	#loop.times { system("./nil.cgi") }
	system("./nil.cgi")
	end
	end

	end

	__END__

	# benchmarker.rb: release 0.0.0
	# RUBY_VERSION: 1.8.7
	# RUBY_PATCHLEVEL: 334
	# RUBY_PLATFORM: i686-darwin10.6.0
	#
	# ## user sys total real
	# (Empty) 0.0000 0.0000 0.0000 0.0006
	# hello1.cgi 0.0600 0.4800 0.5400 11.4261
	# hello2.cgi 0.0600 0.4600 0.5200 22.5066
	# hello3.cgi 0.0600 0.4900 0.5500 22.6741
	# hello4.cgi 0.0600 0.4400 0.5000 35.5769
	# env1.cgi 0.0700 0.4700 0.5400 23.0187
	# env2.cgi 0.0700 0.4500 0.5200 35.7513
	# nil.cgi > /dev/null 0.0500 0.5300 0.5800 11.3228 (A)
	# nil.cgi 0.0500 0.5300 0.5800 7.5846 (B)
	#
	# (A) 11.3228 - (B) 7.5846 = 3.7382
	#
	# ## real
	# hello1.cgi 11.4261 - 3.7382 = 7.6879 # require nothing
	# hello2.cgi 22.5066 - 3.7382 = 18.7684 # require 'cgi'
	# hello3.cgi 22.6741 - 3.7382 = 18.9359 # require 'cgi'; cgi = CGI.new
	# hello4.cgi 35.5769 - 3.7382 = 31.8387 # require 'cgi' & 'cgi/session'
	# env1.cgi 23.0187 - 3.7382 = 19.2805 # hello3.cgi + html
	# env2.cgi 35.7513 - 3.7382 = 32.0131 # hello4.cgi + html
	#
	#
	# process invocation: 7.5846 (= (B))
	# print statements: 0.1033 (= 7.6879 - 7.5846)
	# require 'cgi': 11.0805 (= 18.7684 - 7.6879)
	# cgi = CGI.new: 0.1675 (= 18.9359 - 18.7684)
	# require 'cgi/session': 12.9028 (= 35.5769 - 22.6741)
	# render html: 0.3446 (= 19.2805 - 18.9359)
	#
	# percentage:
	# process invocation: 39.34 % (= 100 * 7.5846 / 19.2805)
	# require 'cgi': 57.47 % (= 100 * 11.0805 / 19.2805)
	# cgi = CGI.new: 0.87 % (= 100 * 0.1675 / 19.2805)
	# print statements: 0.54 % (= 100 * 0.1033 / 19.2805)
	# render html: 1.79 % (= 100 * 0.3446 / 19.2805)