Comparison of various block delegation methods in Ruby

call_methods.rb

#!/usr/bin/env ruby

require 'benchmark'

def with_call(object, &block)
  block.call(object)
end

def with_proc(object)
  Proc.new.call(object)
end

def with_yield(object)
  yield(object)
end

count = 10000000

Benchmark.bm do |x|
  object = Hash.new { |h,k| h[k] = 0 }

  x.report("call") { count.times { with_call(object) { |o| o[:call] += 1 } } }
  x.report("proc") { count.times { with_proc(object) { |o| o[:proc] += 1 } } }
  x.report("yield") { count.times { with_yield(object) { |o| o[:yield] += 1 } } }
end

#        user     system      total        real
# call  9.950000   0.180000  10.130000 ( 10.157157)
# proc 10.740000   0.140000  10.880000 ( 10.899302)
# yield  2.470000   0.000000   2.470000 (  2.480088)