Performance of different block invocations using Ruby 2.1.2

benchmark.rb

# Adapted from http://blog.sidu.in/2008/01/ruby-blocks-redux-ruby-190-ruby-186-and.html

require 'benchmark'

def implicit(*args)
  yield args.join(' ')
end

def explicit(*args, &block)
  block.call args.join(' ')
end

def explicit_binding_before_passing(block, *args)
  block.call args.join(' ')
end

n = 1_000_000

Benchmark.bmbm(10) do |r|
  r.report('Implicit') do
    n.times { implicit('John', 'Doe') { |name| "Hello #{name}" } }
  end

  r.report('Explicitly binds block when passed') do
    n.times { explicit('John', 'Doe') { |name| "Hello #{name}" } }
  end

  r.report('Explicitly binds block before passing') do
    n.times do
      the_block = lambda { |name| "Hello #{name}" }
      explicit_binding_before_passing(the_block, 'John', 'Doe')
    end
  end
end

# Rehearsal -------------------------------------------------------------------------
# Implicit                                2.470000   0.010000   2.480000 (  2.482136)
# Explicitly binds block when passed      3.530000   0.000000   3.530000 (  3.530032)
# Explicitly binds block before passing   3.500000   0.000000   3.500000 (  3.502021)
# ---------------------------------------------------------------- total: 9.510000sec

#                                             user     system      total        real
# Implicit                                2.540000   0.000000   2.540000 (  2.544439)
# Explicitly binds block when passed      3.640000   0.000000   3.640000 (  3.647409)
# Explicitly binds block before passing   3.610000   0.000000   3.610000 (  3.616882)