Find anagrams in Ruby

anagram.rb

require "benchmark"

time = Benchmark.measure do
  words = File.read("wordlist.txt").downcase.split("\n")

  anagrams = Hash.new{|hash, key| hash[key] = []}
  words.each do |word|
    root = word.chars.sort.join
    anagrams[root] << word
  end

  anagrams.select{|_,w| w.uniq.size > 1}.each do |_, words|
    puts "#{words.shift} is anagram of #{words.uniq.join(', is anagram of ')}"
  end
end

puts time