#!/usr/bin/env ruby -w

require "benchmark"

TESTS = 1_000_000
Benchmark.bmbm do |results|
  results.report("a block:") { TESTS.times {
    ("a".."z").map { |l| l.capitalize }
  } }
  results.report("Symbol#to_proc:") { TESTS.times {
    ("a".."z").map(&:capitalize)
  } }
end

# $ ruby_dev -v block_speed.rb
# ruby 1.9.0 (2008-10-10 revision 0) [i386-darwin9.5.0]
# Rehearsal ---------------------------------------------------
# a block:         19.750000   0.130000  19.880000 ( 20.175337)
# Symbol#to_proc:  19.510000   0.130000  19.640000 ( 20.248905)
# ----------------------------------------- total: 39.520000sec
#
#                       user     system      total        real
# a block:         19.670000   0.110000  19.780000 ( 20.050430)
# Symbol#to_proc:  19.510000   0.130000  19.640000 ( 19.895247)