1 11 21 1211

gistfile1.rb

require 'benchmark'

TIMES = 12

Benchmark.bm do |b|  	
	
  b.report "mine" do

    def next_m(m)
      r, prev, sum = "", m[0], 0
      m.each_char do |c|				
        if prev !=  c					
          r << "#{sum}#{prev}"
          sum, prev = 0, c
        end
        sum += 1
      end
      r << "#{sum}#{prev}"
    end

    s = '1'
    TIMES.times {s = next_m(s)}	
  end
	
  b.report "their" do

    def look_and_say(m)
      m.gsub(/(.)\1*/){|s| "#{s.size}#{s[0]}"}
    end
		
    s = "1"
    TIMES.times {s = look_and_say(s)}
  end

end