tmp.rb

# coding: utf-8
require 'benchmark'
require 'securerandom'

def get_random_word(len)
  alphabet = "abcdefghijklmnopqrstuvwxyzABCEDFGHIJKLMNOPQRSTUVWXYZ0123456789"
  alphabet_len = alphabet.size
  random_word = ""
  len.times do
     random_index = SecureRandom.random_number(alphabet_len)
     random_word << alphabet[random_index]  # Concaténation du caractère
  end
  return random_word  # Retourner le résultat
end

#Retourne un mot aléatoire de len caractères (version récursive)
def get_random_word_recur(len, random_word="")
  alphabet = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789'
  alphabet_size = alphabet.size
  if len == 0
    return random_word
  else
    random_char =  alphabet[SecureRandom.random_number(alphabet_size)]
    random_word << random_char
    return get_random_word_recur(len - 1, random_word)
  end
end

N = 1e5.to_i

Benchmark.bmbm do |x|
  x.report("times") { N.times { get_random_word(10) } }
  x.report("recur") { N.times { get_random_word_recur(10) } }
end

__END__
Rehearsal -----------------------------------------
times   0.570000   0.000000   0.570000 (  0.568214)
recur   0.760000   0.000000   0.760000 (  0.760474)
-------------------------------- total: 1.330000sec

            user     system      total        real
times   0.560000   0.000000   0.560000 (  0.559365)
recur   0.760000   0.000000   0.760000 (  0.757587)