gistfile1.txt

$ cat b2.rb
require 'forwardable'
require 'pp'
require 'benchmark/ips'

class Obj
  extend Forwardable

  attr_accessor :other

  def initialize
    @other = Other.new
  end

  def foo_with_double_splat_with_name(**kw)
    @other.foo(**kw)
  end

  def foo_with_double_splat(**)
    @other.foo(**)
  end

  def foo_with_triple_dots(...)
    @other.foo(...)
  end

  delegate :foo => :@other
end

class Other
  def foo(**kw) end
end

o = Obj.new

Benchmark.ips do |x|
  x.report 'simple call' do
    o.other.foo(x: 1)
  end

  x.report 'delegate with double splat with name' do
    o.foo_with_double_splat_with_name(x: 1)
  end

  x.report 'delegate with double splat' do
    o.foo_with_double_splat(x: 1)
  end

  x.report 'delegate with triple dots' do
    o.foo_with_triple_dots(x: 1)
  end

  x.report 'delegate via forwardable' do
    o.foo(x: 1)
  end
end
$ ./ruby-old b2.rb
Warming up --------------------------------------
         simple call    628.959k i/100ms
delegate with double splat with name
                       410.327k i/100ms
delegate with double splat
                       414.942k i/100ms
delegate with triple dots
                       280.816k i/100ms
delegate via forwardable
                       260.609k i/100ms
Calculating -------------------------------------
         simple call      6.258M (± 1.0%) i/s -     31.448M in   5.026023s
delegate with double splat with name
                          4.131M (± 2.2%) i/s -     20.927M in   5.068590s
delegate with double splat
                          3.938M (±13.8%) i/s -     19.087M in   5.007478s
delegate with triple dots
                          2.799M (± 1.6%) i/s -     14.041M in   5.017348s
delegate via forwardable
                          2.573M (± 1.8%) i/s -     13.030M in   5.066372s
excelsior:ruby$ ruby b2.rb
Warming up --------------------------------------
         simple call   586.048k i/100ms
delegate with double splat with name
                       392.506k i/100ms
delegate with double splat
                       405.514k i/100ms
delegate with triple dots
                       155.868k i/100ms
delegate via forwardable
                       256.261k i/100ms
Calculating -------------------------------------
         simple call      6.025M (± 2.4%) i/s -     30.474M in   5.061014s
delegate with double splat with name
                          4.036M (± 1.9%) i/s -     20.410M in   5.058897s
delegate with double splat
                          4.033M (± 1.3%) i/s -     20.276M in   5.028230s
delegate with triple dots
                          1.573M (± 2.1%) i/s -      7.949M in   5.056634s
delegate via forwardable
                          2.554M (± 2.7%) i/s -     12.813M in   5.020564s