ruby lambdas / procs / blocks

output.txt

bare block:
Measure Mode: wall_time
Thread ID: 70093342368220
Fiber ID: 70093351182580
Total: 1.095921
Sort by: self_time

 %self      total      self      wait     child     calls  name
 84.49      0.926     0.926     0.000     0.000        1   Array#map
 15.50      0.170     0.170     0.000     0.000        2   Integer#times
  0.00      1.096     0.000     0.000     1.096        1   Global#[No method]
  0.00      0.170     0.000     0.000     0.170        1   Enumerator#each
  0.00      0.170     0.000     0.000     0.170        1   Enumerable#to_a

* indicates recursively called methods
========================================
Proc:
Measure Mode: wall_time
Thread ID: 70093342368220
Fiber ID: 70093351182580
Total: 3.384458
Sort by: self_time

 %self      total      self      wait     child     calls  name
 48.35      1.636     1.636     0.000     0.000  5000000   Proc#call
 46.72      3.218     1.581     0.000     1.636        1   Array#map
  4.93      0.167     0.167     0.000     0.000        2   Integer#times
  0.00      3.384     0.000     0.000     3.384        1   Global#[No method]
  0.00      0.167     0.000     0.000     0.167        1   Enumerator#each
  0.00      0.167     0.000     0.000     0.167        1   Enumerable#to_a

* indicates recursively called methods
========================================
Lambda:
Measure Mode: wall_time
Thread ID: 70093342368220
Fiber ID: 70093351182580
Total: 3.315006
Sort by: self_time

 %self      total      self      wait     child     calls  name
 49.08      1.627     1.627     0.000     0.000  5000000   Proc#call
 45.82      3.146     1.519     0.000     1.627        1   Array#map
  5.09      0.169     0.169     0.000     0.000        2   Integer#times
  0.00      3.315     0.000     0.000     3.315        1   Global#[No method]
  0.00      0.169     0.000     0.000     0.169        1   Enumerable#to_a
  0.00      0.169     0.000     0.000     0.169        1   Enumerator#each

* indicates recursively called methods
========================================
method:
Measure Mode: wall_time
Thread ID: 70093342368220
Fiber ID: 70093351182580
Total: 2.962332
Sort by: self_time

 %self      total      self      wait     child     calls  name
 51.35      2.801     1.521     0.000     1.279        1   Array#map
 43.18      1.279     1.279     0.000     0.000  5000000   Object#meth
  5.46      0.162     0.162     0.000     0.000        2   Integer#times
  0.00      2.962     0.000     0.000     2.962        1   Global#[No method]
  0.00      0.162     0.000     0.000     0.162        1   Enumerable#to_a
  0.00      0.162     0.000     0.000     0.162        1   Enumerator#each

* indicates recursively called methods
========================================

tester.rb

require 'ruby-prof'

proc = Proc.new { |x| x * 2 }
lam = lambda { |x| x * 2 }

def meth(x)
  x * 2
  nil
end

results = {}
times = 5000000

RubyProf.measure_mode = RubyProf::WALL_TIME

RubyProf.start
(times).times.to_a.map { |x| x * 2 }
results["bare block"] = RubyProf.stop

RubyProf.start
(times).times.to_a.map { |x| proc.call(x) }
results["Proc"] = RubyProf.stop

RubyProf.start
(times).times.to_a.map { |x| lam.call(x) }
results["Lambda"] = RubyProf.stop

RubyProf.start
(times).times.to_a.map { |x| meth(x) }
results["method"] = RubyProf.stop

results.each do |k, v|
  puts "#{k}:"
  RubyProf::FlatPrinter.new(v).print(STDOUT)
  puts "="*40
end