Compares method execution performance

method_performance_comparison.rb

require 'benchmark/ips'

class A
  def sum
    1 + 1
  end
end

class B
  def sum
    eval("1 + 1")
  end
end

class C
  define_method(:sum) {
    1 + 1
  }
end

class D
  def sum
    Proc.new { 1 + 1 }.call
  end
end

class E
  def sum
    -> { 1 + 1 }.call
  end
end

Benchmark.ips do |x|
  x.config(:time => 20, :warmup => 2)

  x.report("Using method") do
    A.new.sum
  end

  x.report("Using eval") do
    B.new.sum
  end

  x.report("Using define_method") do
    C.new.sum
  end

  x.report("Using proc") do
    D.new.sum
  end

  x.report("Using lambda") do
    E.new.sum
  end

  x.compare!
end

results.txt

Calculating -------------------------------------
        Using method    86.320k i/100ms
          Using eval    12.111k i/100ms
 Using define_method    86.212k i/100ms
          Using proc    48.346k i/100ms
        Using lambda    49.955k i/100ms
-------------------------------------------------
        Using method      3.404M (± 6.2%) i/s -     67.761M
          Using eval    137.423k (± 9.7%) i/s -      2.725M
 Using define_method      2.807M (± 5.9%) i/s -     55.952M
          Using proc    791.085k (± 7.9%) i/s -     15.712M
        Using lambda    852.819k (± 6.3%) i/s -     16.985M

Comparison:
        Using method:  3403761.0 i/s
 Using define_method:  2807353.2 i/s - 1.21x slower
        Using lambda:   852819.4 i/s - 3.99x slower
          Using proc:   791085.4 i/s - 4.30x slower
          Using eval:   137423.1 i/s - 24.77x slower