struct-initialization-benchmark.rb

require "benchmark/ips"

puts RUBY_DESCRIPTION

class Inherit < Struct.new(:id, :name, :age)
  def name_and_age
    "#{name}, #{age}"
  end
end

Block = Struct.new(:id, :name, :age) do
  def name_and_age
    "#{name}, #{age}"
  end
end

Reopen = Struct.new(:id, :name, :age)
class Reopen
  def name_and_age
    "#{name}, #{age}"
  end
end

Benchmark.ips do |x|
  x.report("Inherit"){ |times|
    i = 0
    while i < times
      Inherit.new(1, 2, 3).name_and_age
      i += 1
    end
  }

  x.report("Block"){ |times|
    i = 0
    while i < times
      Block.new(1, 2, 3).name_and_age
      i += 1
    end
  }

  x.report("Reopen"){ |times|
    i = 0
    while i < times
      Reopen.new(1, 2, 3).name_and_age
      i += 1
    end
  }

  x.compare!
end

struct-initialization-benchmark.results

ruby 2.2.2p95 (2015-04-13 revision 50295) [x86_64-linux]

Calculating -------------------------------------
             Inherit    52.839k i/100ms
               Block    52.457k i/100ms
              Reopen    52.828k i/100ms
-------------------------------------------------
             Inherit      1.152M (± 3.6%) i/s -      5.759M
               Block      1.200M (± 2.4%) i/s -      6.033M
              Reopen      1.203M (± 0.9%) i/s -      6.022M

Comparison:
              Reopen:  1202725.9 i/s
               Block:  1199646.4 i/s - 1.00x slower
             Inherit:  1151912.6 i/s - 1.04x slower


jruby 9.0.0.0-SNAPSHOT (2.2.2) 2015-05-04 6055b79 Java HotSpot(TM) 64-Bit Server VM 24.80-b11 on 1.7.0_80-b15 +indy +jit [linux-amd64]

Calculating -------------------------------------
             Inherit    24.651k i/100ms
               Block    52.973k i/100ms
              Reopen    55.793k i/100ms
-------------------------------------------------
             Inherit      1.366M (±11.2%) i/s -      6.656M
               Block      1.436M (± 9.4%) i/s -      7.098M
              Reopen      1.464M (± 8.2%) i/s -      7.253M

Comparison:
              Reopen:  1463500.4 i/s
               Block:  1436473.0 i/s - 1.02x slower
             Inherit:  1365655.1 i/s - 1.07x slower


rubinius 2.5.3 (2.1.0 2482b093 2015-04-28 3.4 JI) [x86_64-linux-gnu]

Calculating -------------------------------------
             Inherit    12.337k i/100ms
               Block    18.838k i/100ms
              Reopen    18.643k i/100ms
-------------------------------------------------
             Inherit    231.421k (± 3.3%) i/s -      1.160M
               Block    241.499k (± 1.4%) i/s -      1.224M
              Reopen    242.887k (± 1.4%) i/s -      1.230M

Comparison:
              Reopen:   242886.6 i/s
               Block:   241499.1 i/s - 1.01x slower
             Inherit:   231420.7 i/s - 1.05x slower