benchmark to measure both h() and escape_html()

bench_escape_html.rb

###
### benchmark to measure both h() and escape_html()
###

require 'rubygems'
require 'benchmarker'

ESCAPE_ = {
  '&' => '&',
  '<' => '&lt;',
  '>' => '&gt;',
  '"' => '&quot;',
}

def h(s)
    s.to_s.gsub(/[&<>"]/) { ESCAPE_[$&] }
end

def escape_html(s)
    s.gsub(/&/, '&amp;').gsub(/</, '&lt;').gsub(/>/, '&gt;').gsub(/"/, '&quot;')
end

nloop = 1000*1000
Benchmarker.new(:width=>30, :cycle=>5, :extra=>1, :barchart=>false) do |bm|
  s1 = "Haruhi Mikuru Yuki Kyon Itsuki"
  bm.task("h(s1)") do
    nloop.times { h(s1) }
  end
  bm.task("escape_html(s1)") do
    nloop.times { escape_html(s1) }
  end
  #
  s2 = "Haruhi&Mikuru&Yuki&Kyon&Itsuki"
  bm.task("h(s2)") do
    nloop.times { h(s2) }
  end
  bm.task("escape_html(s2)") do
    nloop.times { escape_html(s2) }
  end
  #
  s3 = "<Haruhi>&<Mikuru>&<Yuki>&<Kyon>&<Itsuki>"
  bm.task("h(s3)") do
    nloop.times { h(s3) }
  end
  bm.task("escape_html(s3)") do
    nloop.times { escape_html(s3) }
  end
end

__END__

# benchmarker.rb:   release 0.0.0
# RUBY_VERSION:     1.8.7
# RUBY_PATCHLEVEL:  334
# RUBY_PLATFORM:    i686-darwin10.6.0
#
# ## Ranking                          real
# h(s1)                             1.6433 (100.0%)       0.61 times/sec
# escape_html(s1)                   3.0330 ( 54.2%)       0.33 times/sec
# escape_html(s2)                   9.4641 ( 17.4%)       0.11 times/sec
# h(s2)                            12.6723 ( 13.0%)       0.08 times/sec
# escape_html(s3)                  19.8207 (  8.3%)       0.05 times/sec
# h(s3)                            40.0310 (  4.1%)       0.02 times/sec
# 
# ## Matrix                           real     [01]     [02]     [03]     [04]     [05]     [06]
# [01] h(s1)                        1.6433   100.0%   184.6%   575.9%   771.1%  1206.1%  2436.0%
# [02] escape_html(s1)              3.0330    54.2%   100.0%   312.0%   417.8%   653.5%  1319.8%
# [03] escape_html(s2)              9.4641    17.4%    32.0%   100.0%   133.9%   209.4%   423.0%
# [04] h(s2)                       12.6723    13.0%    23.9%    74.7%   100.0%   156.4%   315.9%
# [05] escape_html(s3)             19.8207     8.3%    15.3%    47.7%    63.9%   100.0%   202.0%
# [06] h(s3)                       40.0310     4.1%     7.6%    23.6%    31.7%    49.5%   100.0%