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

Run details:

User agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.99 Safari/537.36

Browser: Chrome 67

Operating system: Windows 7

Device Platform: Desktop

Date tested: 5 years ago

Test name	Executions per second
JSON	396236.5 Ops/sec
Copy (no generic)	4645327.5 Ops/sec
Copy (generic)	2015027.1 Ops/sec

Script Preparation code:

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)

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

JSON

Copy (no generic)

Copy (generic)