gistfile1.rb

require 'benchmark'

puts "Setting up..."
array = []
10000.times { |i| array << i }

puts "Running..."
Benchmark.bmbm do |bm|
  bm.report('.reverse_each') do
    10000.times { array.reverse_each { |i| } }
  end
  bm.report('.reverse.each') do
    10000.times { array.reverse.each { |i| } }
  end
end

# Setting up...
# Running...
# Rehearsal -------------------------------------------------
# .reverse_each  11.520000   0.020000  11.540000 ( 11.528721)
# .reverse.each  11.840000   0.070000  11.910000 ( 11.910495)
# --------------------------------------- total: 23.450000sec
# 
#                     user     system      total        real
# .reverse_each  11.620000   0.020000  11.640000 ( 11.632423)
# .reverse.each  11.800000   0.050000  11.850000 ( 11.844841)