OpenStruct performance in ruby 2.4.

openstruct_benchmark.rb

# Code from http://www.chrisrolle.com/en/blog/struct-vs-openstruct-benchmark

# gem install benchmark-ips
require 'benchmark/ips'
require 'ostruct'


class GCSuite
  def warming(*)
    run_gc
  end

  def running(*)
    run_gc
  end

  def warmup_stats(*); end

  def add_report(*); end

  private

  def run_gc
    GC.enable
    GC.start
    GC.disable
  end
end
suite = GCSuite.new

GeoStruct = Struct.new(:latitude, :longitude)

class GeoClass
  attr_accessor :latitude, :longitude

  def initialize(latitude:, longitude:)
    @latitude = latitude
    @longitude = longitude
  end
end


Benchmark.ips do |bm|
  bm.config(suite: suite)

  bm.report('GeoStruct.new') do
    GeoStruct.new(53.6, 11.4)
  end

  bm.report('Hash {}') do
    { latitude: 53.6, longitude: 11.4 }
  end

  bm.report('GeoClass.new') do
    GeoClass.new(latitude: 53.6, longitude: 11.4)
  end

  bm.report('OpenStruct.new') do
    OpenStruct.new(latitude: 53.6, longitude: 11.4)
  end
end

output.sh

$ ruby --version
ruby 2.4.1p111 (2017-03-22 revision 58053) [x86_64-darwin17]

$ ruby openstruct_benchmark.rb
Warming up --------------------------------------
       GeoStruct.new   203.737k i/100ms
             Hash {}   130.395k i/100ms
        GeoClass.new    49.455k i/100ms
      OpenStruct.new    61.689k i/100ms
Calculating -------------------------------------
       GeoStruct.new      3.569M (±21.7%) i/s -     16.503M in   5.046587s
             Hash {}      1.953M (±15.4%) i/s -      9.649M in   5.084186s
        GeoClass.new    808.680k (±33.9%) i/s -      3.610M in   5.132875s
      OpenStruct.new    708.399k (±32.8%) i/s -      3.146M in   5.087367s