benchmark simple ruby string to int hashing

bench_string_hash.rb

require 'benchmark'

strs = 1000.times.map{(0...32).map{(65 + rand(26)).chr}.join}

Benchmark.bm(6) do |x|
  x.report('sum') { 100.times{strs.each &:sum} }  
  x.report('digest') { 100.times{strs.each{|s| Digest::MD5.hexdigest(s).to_i(16) }}}  
end

#              user     system      total        real
# sum      0.000000   0.000000   0.000000 (  0.007893)
# digest   0.290000   0.030000   0.320000 (  0.309167)