Benchmark JSON serialization

benchmark.rb

require 'benchmark/ips'
require "json"
require "oj"
require "hanami/utils/json"
require "multi_json"

MultiJson.adapter = :oj

puts "MultiJson.current_adapter => #{MultiJson.current_adapter}"

Benchmark.ips do |x|
  x.time = 5
  x.warmup = 2

  hash = { foo: :bar }

  x.report("json")        { JSON.dump(hash) }
  x.report("multi_json")  { MultiJson.dump(hash) }
  x.report("oj")          { Oj.dump(hash) }
  x.report("hanami_json") { Hanami::Utils::Json.generate(hash) }

  x.compare!
end

gistfile1.txt

$ ruby benchmark.rb

MultiJson.current_adapter => MultiJson::Adapters::Oj
Warming up --------------------------------------
                json    25.510k i/100ms
          multi_json    30.283k i/100ms
                  oj   195.267k i/100ms
         hanami_json    30.262k i/100ms
Calculating -------------------------------------
                json    276.929k (± 5.8%) i/s -      1.403M in   5.086634s
          multi_json    333.933k (± 7.4%) i/s -      1.696M in   5.111007s
                  oj      3.808M (± 6.6%) i/s -     18.941M in   5.008266s
         hanami_json    326.919k (± 5.7%) i/s -      1.634M in   5.018832s

Comparison:
                  oj:  3808256.4 i/s
          multi_json:   333932.8 i/s - 11.40x  slower
         hanami_json:   326918.8 i/s - 11.65x  slower
                json:   276929.4 i/s - 13.75x  slower