View difference between Paste ID: giBK030H and 1xhsTT5e

 require 'json'
 require 'benchmark'
 require 'oj'
 require 'yajl'
 
 a = {'asdfg'=> 'asdfg', 'qwert'=> 'asdfatqwtrqewt', 'rewqrq'=>543252, 'reqrqwer'=>[143245,1234421]}
 j = a.to_json
 
 N = (ARGV[0] || 100000).to_i
 
 Benchmark.bmbm(6) do |x|
-#Benchmark.bm do |x|
+  x.report('json g') do N.times{a.to_json } end
-  x.report('json g') do N.times{|_| a['vczx'] = _; a.to_json} end
+  x.report('yajl g') do N.times{Yajl.dump(a)} end
-  x.report('yajl g') do N.times{|_| a['vczx'] = _; Yajl.dump(a)} end
+  x.report('oj   g') do N.times{Oj.dump(a)} end
-  x.report('oj   g') do N.times{|_| a['vczx'] = _; Oj.dump(a)} end
+  x.report('ojc  g') do N.times{Oj.dump(a, mode: :compat)} end
-  x.report('ojc  g') do N.times{|_| a['vczx'] = _; Oj.dump(a, mode: :compat)} end
+  x.report('json p') do N.times{JSON.parse(j)} end
-  x.report('json p') do N.times{|_| JSON.parse(j)} end
+  x.report('yajl p') do N.times{Yajl.load(j)} end
-  x.report('yajl p') do N.times{|_| Yajl.load(j)} end
+  x.report('oj   g') do N.times{Oj.load(j)} end
-  x.report('oj   g') do N.times{|_| Oj.load(j)} end
+  x.report('ojc  g') do N.times{Oj.load(j, mode: :compat)} end
-  x.report('ojc  g') do N.times{|_| Oj.load(j, mode: :compat)} end
+  # Correct use of Oj::Doc
-  x.report('ojdocg') do N.times{|_| Oj::Doc.parse(j).fetch} end
+  x.report('ojdocg') do N.times{Oj::Doc.open(j) { |x| x.fetch('asdfg') } } end
-end
+end
 
 # results from ruby 1.9.3-p194 on OS X
 
               user     system      total        real
 json g    0.700000   0.010000   0.710000 (  0.706307)
 yajl g    0.660000   0.000000   0.660000 (  0.658921)
 oj   g    0.490000   0.000000   0.490000 (  0.487269)
 ojc  g    0.570000   0.000000   0.570000 (  0.571865)
 json p    0.850000   0.000000   0.850000 (  0.851527)
 yajl p    0.750000   0.000000   0.750000 (  0.744586)
 oj   g    0.350000   0.000000   0.350000 (  0.351567)
 ojc  g    0.450000   0.000000   0.450000 (  0.447477)
 ojdocg    0.110000   0.000000   0.110000 (  0.114286)