Benchmark using ARGS constant for default method arguments

keyword_default_arguments_bench.rb

require 'benchmark/ips'

Benchmark.ips do |benchmark|
  benchmark.config(time: 5, warmup: 2)


  benchmark.report("keyword-args") do
    def foo(a: nil, b: nil, c: nil, d: nil, e: 1)
      bar(a: a, b: b, c: c, d: d, e: e)
    end

    def bar(a: nil, b: nil, c: nil, d: nil, e: 1)
      e
    end

    foo()
  end

  benchmark.report("opts-hash") do
    def foo(args={e: 1})
      bar(args)
    end

    def bar(args={e: 1})
      args[:e]
    end

    foo()
  end

  ARGS = {e: 1}.freeze
  benchmark.report("opts-hash-constant") do
    def foo(args=ARGS)
      bar(args)
    end

    def bar(args=ARGS)
      args[:e]
    end

    foo()
  end

  benchmark.compare!
end


# Warming up --------------------------------------
#         keyword-args   115.586k i/100ms
#            opts-hash   112.823k i/100ms
#   opts-hash-constant   121.602k i/100ms
# Calculating -------------------------------------
#         keyword-args      1.150M (± 1.3%) i/s -      5.779M in   5.025485s
#            opts-hash      1.117M (± 2.2%) i/s -      5.641M in   5.054257s
#   opts-hash-constant      1.204M (± 1.6%) i/s -      6.080M in   5.050975s
# 
# Comparison:
#   opts-hash-constant:  1204049.0 i/s
#         keyword-args:  1150182.8 i/s - 1.05x  (± 0.00) slower
#            opts-hash:  1116677.8 i/s - 1.08x  (± 0.00) slower