$ rbx -P gem -h
% cumulative self self total
time seconds seconds calls ms/call ms/call name
------------------------------------------------------------
0.00 0.00 0.00 3 0.05 0.17 Array#collect
0.00 0.00 0.00 1 0.00 0.01 IO#flush
0.00 0.00 0.00 12 0.00 0.00 RbYAML::ScalarNode#__is_scalar
0.00 0.00 0.00 24 0.00 0.04 <metaclass>#OptionParser {}
0.02 0.12 0.12 114431 0.00 0.00 Array#at
0.00 0.00 0.00 12 0.00 0.00 RbYAML::ScalarEvent#__is_scalar
0.00 0.00 0.00 27 0.00 0.00 Gem::CommandManager#command_names {}
0.00 0.00 0.00 2 0.00 0.00 RbYAML::Event#__is_scalar
0.01 0.04 0.03 21118 0.00 0.00 Array#[]=
0.01 0.09 0.08 4572 0.02 0.02 Compiler::Node#set_position
0.00 0.00 0.00 17 0.00 0.06 Module#const_defined?
0.19 1.13 0.26 35464 0.01 0.03 Class#new
0.00 0.00 0.00 114 0.00 0.01 Compiler::Generator#goto
0.00 0.02 0.00 388 0.00 0.06 Module#normalize_const_name
0.01 0.06 0.02 6941 0.00 0.01 Compiler::Generator#add
0.00 0.00 0.00 1 0.01 0.13 IO#read
0.00 0.00 0.00 144 0.00 0.02 Rubinius::AccessVariable.get_ivar
0.00 0.00 0.00 1 0.00 0.00 Fixnum#zero?
0.00 0.00 0.00 213 0.00 0.01 Enumerable#collect {}
0.00 0.02 0.01 3995 0.00 0.00 Hash#__initialize__
0.02 0.13 0.09 34838 0.00 0.00 Array#<<
0.00 0.01 0.00 388 0.00 0.04 Module#valid_const_name?
0.00 0.00 0.00 87 0.00 0.00 Module#filter_methods {}
0.00 0.00 0.00 2 0.02 0.22 Module#const_path_defined?
0.00 0.00 0.00 126 0.00 0.00 Hash#keys {}
0.00 0.00 0.00 2 0.01 0.02 Module#const_path_defined? {}
0.02 0.14 0.00 2 0.01 70.50 Gem::ConfigFile#load_file
0.00 0.00 0.00 1 0.01 0.07 Kernel#clone
0.04 0.26 0.02 1698 0.01 0.15 Hash.[]
0.00 0.00 0.00 1 0.01 0.11 Kernel#exit
0.00 0.00 0.00 4 0.01 0.02 File.exist?
0.00 0.00 0.00 1 0.05 1.06 Gem::DocManager.__class_init__
0.00 0.00 0.00 1 0.02 0.51 IO.read
0.00 0.02 0.00 1 0.65 21.57 OptionParser.__class_init__
0.02 0.14 0.00 1 0.01 140.40 RbYAML.load
0.00 0.02 0.00 1 0.09 16.09 Gem::ConfigFile.__class_init__
0.00 0.00 0.00 1 0.00 2.27 Gem::CommandManager.instance
0.01 0.08 0.00 1 0.01 80.11 NilClass.__class_init__
0.00 0.00 0.00 33 0.00 0.02 Compiler::Generator#set_ivar
0.01 0.08 0.00 1 0.01 79.65 FalseClass.__class_init__
0.01 0.04 0.00 1160 0.00 0.03 Compiler::Generator#find_literal
0.01 0.08 0.00 1 0.01 79.68 TrueClass.__class_init__
0.00 0.00 0.00 110 0.00 0.02 Rubinius::AccessVariable.set_ivar
0.01 0.08 0.00 1 0.01 79.63 Float.__class_init__
0.00 0.00 0.00 1 0.01 1.22 Gem::ConfigFile#config_file_name
1,367 methods omitted
1,412 methods called a total of 3,187,522 times