Split spring to array

split.rb

require 'benchmark'

def use_split(input)
  input.each do |s|
    a = s.split(//)
  end
end

def use_each_char(input)
  input.each do |s|
    a = s.each_char.to_a
  end
end 

srand(1)
input = Array.new(100) do
  s = ""
  10000.times do
    s << (rand*10).to_i.to_s
  end
  s
end

r1 = Benchmark.realtime do
  use_split(input)
end

r2 = Benchmark.realtime do
  use_each_char(input)
end

puts "split     #{r1} [sec]" # => split     0.26577499999984866 [sec]
puts "each_char #{r2} [sec]" # => each_char 0.08966800000052899 [sec]