gistfile1.rb

require 'benchmark'

N      =  1000000
fixnum =  1234567
float  =  1.234567
string = 'abcdefg'
symbol = :symbol!

Benchmark.bm(11) do |x|
  x.report 'Fixnum#to_s' do
    (1..N).each { fixnum.to_s }
  end

  x.report '"#{Fixnum}"' do
    (1..N).each { "#{fixnum}" }
  end
  x.report 'Float#to_s' do
    (1..N).each { float.to_s }
  end

  x.report '"#{Float}"' do
    (1..N).each { "#{float}" }
  end

  x.report 'Symbol#to_s' do
    (1..N).each { symbol.to_s }
  end

  x.report '"#{Symbol}"' do
    (1..N).each { "#{symbol}" }
  end

  x.report 'String#to_s' do
    (1..N).each { string.to_s }
  end

  x.report '"#{String}"' do
    (1..N).each { "#{string}" }
  end
end

=begin
                  user     system      total        real
Fixnum#to_s   0.230000   0.000000   0.230000 (  0.232231)
"#{Fixnum}"   0.310000   0.010000   0.320000 (  0.321770)
Float#to_s    0.620000   0.010000   0.630000 (  0.629486)
"#{Float}"    0.890000   0.040000   0.930000 (  0.941235)
Symbol#to_s   0.150000   0.000000   0.150000 (  0.147023)
"#{Symbol}"   0.220000   0.020000   0.240000 (  0.234657)
String#to_s   0.070000   0.000000   0.070000 (  0.070717)
"#{String}"   0.130000   0.000000   0.130000 (  0.141269)
=end