Ruby memoization gem benchmarks

bench.rb

require "bundler/inline"

gemfile(true) do
  source "https://rubygems.org"

  gem 'benchmark-ips'
  gem 'benchmark-memory'
  gem 'memo-it'
  gem 'memoist'
  gem 'memery'
end

class Base
  class << self
    def base_find(char)
      ('a'..'k').find { |letter| letter == char }
    end
  end
end

class MemeryTest < Base
  class << self
    include Memery

    memoize def find(char)
      base_find(char)
    end
  end
end

class MemoItTest < Base
  class << self
    include Memery

    def find(char)
      memo { base_find(char) }
    end
  end
end

class MemoistTest < Base
  class << self
    extend Memoist

    def find(char)
      base_find(char)
    end
    memoize :find
  end
end

Benchmark.ips do |x|
  x.report('memery') { MemeryTest.find('f') }
  x.report('memo-it') { MemoItTest.find('f') }
  x.report('memoist') { MemoistTest.find('f') }

  x.compare!
end

Benchmark.memory do |x|
  x.report('memery') { MemeryTest.find('f') }
  x.report('memo-it') { MemoItTest.find('f') }
  x.report('memoist') { MemoistTest.find('f') }

  x.compare!
end

results

Warming up --------------------------------------
              memery    24.779k i/100ms
             memo-it    11.322k i/100ms
             memoist    34.413k i/100ms
Calculating -------------------------------------
              memery    317.181k (± 5.8%) i/s -      1.586M in   5.019854s
             memo-it    138.049k (± 7.7%) i/s -    690.642k in   5.036792s
             memoist    422.394k (± 5.9%) i/s -      2.134M in   5.071838s

Comparison:
             memoist:   422394.3 i/s
              memery:   317181.0 i/s - 1.33x  slower
             memo-it:   138049.2 i/s - 3.06x  slower

Calculating -------------------------------------
              memery   368.000  memsize (     0.000  retained)
                         6.000  objects (     0.000  retained)
                         4.000  strings (     0.000  retained)
             memo-it   736.000  memsize (     0.000  retained)
                        11.000  objects (     0.000  retained)
                         1.000  strings (     0.000  retained)
             memoist   192.000  memsize (     0.000  retained)
                         4.000  objects (     0.000  retained)
                         2.000  strings (     0.000  retained)

Comparison:
             memoist:        192 allocated
              memery:        368 allocated - 1.92x more
             memo-it:        736 allocated - 3.83x more