Deep Copy vs JSON Stringify / JSON Parse

JavaScript performance comparison

Revision 38 of this test case created by

Preparation code

<script src="http://underscorejs.org/underscore-min.js"></script>
      
<script>
Benchmark.prototype.setup = function() {
  function deepCopy(o) {
      var copy = o,k;
   
      if (o && typeof o === 'object') {
          copy = Object.prototype.toString.call(o) === '[object Array]' ? [] : {};
          for (k in o) {
              copy[k] = deepCopy(o[k]);
          }
      }
   
      return copy;
  }
  
  var uc = {bir:{iki:{uc:3}}}

};
</script>

Test runner

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Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
Deep Copy
var bes = deepCopy(uc)
pending…
JSON Stringify / JSON Parse
var bes = JSON.parse(JSON.stringify(uc))
pending…
underscore clone + map
var bes = _.map(uc, _.clone); 
pending…

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Revisions

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