Testing string operations in ruby

ruby_strings.rb

require 'benchmark'

iterations = 100_000

puts 'With Static Strings'
puts '======================================================'
Benchmark.bm do |bm|
  bm.report('joining an array of strings') do
    iterations.times do
      ['Testing', 'String', 'Operations', 'in', 'Ruby'].join(' ')
    end
  end

  bm.report('string interpolation') do
    iterations.times do
      "Testing String Operations in Ruby"
    end
  end

  bm.report('string concatenation') do
    iterations.times do
      'Testing' + 'String' + 'Operations' + 'in' + 'Ruby'
    end
  end

  bm.report('string concatenation without plus sign') do
    iterations.times do
      'Testing ' 'String ' 'Operations ' 'in ' 'Ruby '
    end
  end

  bm.report('using << sign') do
    iterations.times do
      'Testing ' << 'String ' << 'Operations ' << 'in ' << 'Ruby '
    end
  end

  bm.report('using concat') do
    iterations.times do
      'Testing '.concat('String ').concat('Operations ').concat('in ').concat('Ruby ')
    end
  end
end

puts 'With dynamic Strings'
puts '======================================================='

string_1 = 'Testing'
string_2 = 'String'
string_3 = 'Operations'
string_4 = 'in'
string_5 = 'Ruby'

Benchmark.bm do |bm|
  bm.report('joining an array of strings') do
    iterations.times do
      [string_1, string_2, string_3, string_4, string_5].join(' ')
    end
  end

  bm.report('string interpolation') do
    iterations.times do
      "#{string_1} #{string_2} #{string_3} #{string_4} #{string_5}"
    end
  end

  bm.report('string concatenation') do
    iterations.times do
      string_1 + ' ' + string_2 + ' ' + string_3 + ' ' + string_4 + ' ' + string_5
    end
  end

  bm.report('using << sign') do
    iterations.times do
      string_1 << ' ' << string_2 << ' ' << string_3 << ' ' << string_4 << ' ' << string_5
    end
  end

  bm.report('using concat') do
    iterations.times do
      string_1.concat(' ').concat(string_2).concat(' ').concat(string_3)
      .concat(' ').concat(string_4).concat(' ').concat(string_5)
    end
  end
end


<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< OUTPUT >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

With Static Strings
======================================================
                                           user     system      total        real
joining an array of strings             0.160000   0.000000   0.160000 (  0.166476)
string interpolation                    0.020000   0.000000   0.020000 (  0.013685)
string concatenation                    0.120000   0.000000   0.120000 (  0.125947)
string concatenation without plus sign  0.020000   0.000000   0.020000 (  0.013228)
using << sign                           0.090000   0.000000   0.090000 (  0.098427)
using concat                            0.110000   0.000000   0.110000 (  0.102523)

With dynamic Strings
=======================================================
                                     user     system      total        real
joining an array of strings        0.120000   0.000000   0.120000 (  0.121523)
string interpolation               0.080000   0.000000   0.080000 (  0.079512)
string concatenation               0.230000   0.000000   0.230000 (  0.234641)
using << sign                      0.110000   0.000000   0.110000 (  0.108388)
using concat                       0.120000   0.000000   0.120000 (  0.118256)