Require performance issue

gistfile1.txt

$ ruby-prof -m 1 cucumber

.... cucumber execution ....

Thread ID: 79705620
Total: 18.210000

 %self     total     self     wait    child    calls  name
 33.85     17.18     6.16     0.00    17.07     2011  Kernel#require
  4.40     17.69     0.80     0.00    17.67    39899  Array#each
  3.57      1.12     0.65     0.00     0.60     1299  Module#class_eval
  3.08      1.40     0.56     0.00     1.05    12596  Array#map
  2.75      1.71     0.50     0.00     1.21      569  Kernel#eval
  2.14      0.39     0.39     0.00     0.00     2192  Kernel#caller
  2.03      0.38     0.37     0.00     0.01   200267  Hash#default
  1.81      0.50     0.33     0.00     0.17     8702  Integer#upto
  1.59      0.29     0.29     0.00     0.00   166702  Symbol#to_s
  1.43      0.26     0.26     0.00     0.00   182648  Module#===
  1.04      0.36     0.19     0.00     0.17    78975  Gem::Version#segments
  1.04      0.75     0.19     0.00     0.56        6  AbstractController::ViewPaths::ClassMethods#view_paths=


$> gem env
RubyGems Environment:
  - RUBYGEMS VERSION: 1.3.7
  - RUBY VERSION: 1.9.2 (2010-07-02 patchlevel -1) [i486-linux]
  - INSTALLATION DIRECTORY: /var/lib/gems/1.9.2/
  - RUBY EXECUTABLE: /usr/bin/ruby1.9.2
  - EXECUTABLE DIRECTORY: /var/lib/gems/1.9.2/bin
  - RUBYGEMS PLATFORMS:
    - ruby
    - x86-linux
  - GEM PATHS:
     - /var/lib/gems/1.9.2/
     - /home/jp/.gem/ruby/1.9.2
     - /var/lib/gems/1.9.2
  - GEM CONFIGURATION:
     - :update_sources => true
     - :verbose => true
     - :benchmark => false
     - :backtrace => false
     - :bulk_threshold => 1000
  - REMOTE SOURCES:
     - http://rubygems.org/

$ irb
irb(main):001:0> Gem.path
=> ["/home/jp/.gem/ruby/1.9.2", "/usr/lib/ruby/gems/1.9.2", "/var/lib/gems/1.9.2/"]
irb(main):002:0>