Hashie vs OpenStruct vs PORO performance

poro-hashie-ostruct-benchmark.rb

require 'hashie'
require 'ostruct'
require 'benchmark/ips'

class PORO
  attr_reader :foo, :bar, :baz

  def initialize attrs = {}
    attrs.each do |attr, value|
      instance_variable_set "@#{attr}", value
    end
  end
end

attrs = {foo: 1, bar: true, baz: 'quux'}
hashie = Hashie::Mash.new(attrs)
ostruct = OpenStruct.new(attrs)
poro = PORO.new(attrs)

Benchmark.ips do |x|
  x.report 'Hashie alloc' do
    Hashie::Mash.new(attrs)
  end

  x.report 'OpenStruct alloc' do
    OpenStruct.new(attrs)
  end

  x.report 'PORO alloc' do
    PORO.new(attrs)
  end

  x.compare!
end


Benchmark.ips do |x|
  x.report 'Hashie access' do
    hashie.foo
    hashie.bar
    hashie.baz
  end

  x.report 'OStruct access' do
    ostruct.foo
    ostruct.bar
    ostruct.baz
  end

  x.report 'PORO access' do
    poro.foo
    poro.bar
    poro.baz
  end

  x.compare!
end



# August 4th, 2018
# benchmark-ips (2.7.2)
# hashie (3.5.7)
# › ruby bm.rb

# Warming up --------------------------------------
#         Hashie alloc    16.192k i/100ms
#     OpenStruct alloc    80.273k i/100ms
#           PORO alloc    68.089k i/100ms
# Calculating -------------------------------------
#         Hashie alloc    160.567k (±15.3%) i/s -    777.216k in   5.041534s
#     OpenStruct alloc    889.794k (±11.0%) i/s -      4.415M in   5.037222s
#           PORO alloc    754.690k (± 8.5%) i/s -      3.745M in   5.003046s

# Comparison:
#     OpenStruct alloc:   889793.9 i/s
#           PORO alloc:   754690.4 i/s - same-ish: difference falls within error
#         Hashie alloc:   160566.8 i/s - 5.54x  slower

# Warming up --------------------------------------
#        Hashie access    49.953k i/100ms
#       OStruct access   199.954k i/100ms
#          PORO access   322.592k i/100ms
# Calculating -------------------------------------
#        Hashie access    565.606k (± 2.3%) i/s -      2.847M in   5.036913s
#       OStruct access      3.661M (± 2.9%) i/s -     18.396M in   5.029748s
#          PORO access      9.389M (± 2.3%) i/s -     47.098M in   5.019371s

# Comparison:
#          PORO access:  9388639.8 i/s
#       OStruct access:  3660851.4 i/s - 2.56x  slower
#        Hashie access:   565605.8 i/s - 16.60x  slower