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Run results for: Deep copy : JSON vs Specified-Method

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Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.2.1 Safari/605.1.15
Safari 17
Mac OS X 10.15.7
Desktop
one year ago
Test name Executions per second
JSON 1529252.0 Ops/sec
Copy (no generic) 6160773.5 Ops/sec
Copy (generic) 2802696.0 Ops/sec
Script Preparation code:
​x
 
function copyX(x) {
  return {
    a: x.a,
    b: x.b,
    c: {
      a: x.c.a
    }
  }
}
​
function cloneObject(obj) {
    var clone = {};
    for(var i in obj) {
        if(obj[i] != null &&  typeof(obj[i])=="object")
            clone[i] = cloneObject(obj[i]);
        else
            clone[i] = obj[i];
    }
    return clone;
}
​
var x = {
  a: 444,
  b: 666,
  c: {
    a: "dddd"
  }
}
Tests:

  • JSON

     
    JSON.parse(JSON.stringify(x))

  • Copy (no generic)

     
    copyX(x)

  • Copy (generic)

     
    cloneObject(x)