ostruct_vs_struct.rb

require 'ostruct'
require 'benchmark'

N = 200_000
string = "Hello, Kitty"
o = OpenStruct.new(hello: string)

S = Struct.new(:hello)
s = S.new(string)

Benchmark.bmbm(20) do |b|
  b.report("create OS"){ N.times{ OpenStruct.new }}
  b.report("write OS"){ N.times{ OpenStruct.new.hello = string }}
  b.report("read OS"){ N.times{ o.hello }}

  b.report("create S"){ N.times{ S.new }}
  b.report("write S"){ N.times{ S.new.hello = string }}
  b.report("read S"){ N.times{ s.hello }}
end