Benchmarking json vs oj with multiple oj modes

json_dump_benchmark.rb

require 'json'
require 'oj'
require 'benchmark'
require 'securerandom'

h = {}
10_000.times{|i| h[SecureRandom.uuid] = i}

Benchmark.bmbm do |x|
  x.report("json") { 1000.times{ n = h.to_json} }
  x.report("oj default") { 1000.times{ n = Oj.dump(h)} }
  x.report("oj compat") { 1000.times{ n = Oj.dump(h, mode: :compat)} }
end

output.txt

Rehearsal ----------------------------------------------
json        13.990000   0.250000  14.240000 ( 14.257051)
oj default   3.260000   0.230000   3.490000 (  3.491028)
oj compat    3.360000   0.240000   3.600000 (  3.593109)
------------------------------------ total: 21.330000sec

                 user     system      total        real
json        13.740000   0.240000  13.980000 ( 13.992641)
oj default   3.020000   0.230000   3.250000 (  3.248077)
oj compat    3.060000   0.230000   3.290000 (  3.286443)