Run results for: toString vs concatenation

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/84.0.4147.135 Safari/537.36

Browser: Chrome 84

Operating system: Windows

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
toString	69285.8 Ops/sec
concatenation	68609.9 Ops/sec

Script Preparation code:

var obj={
  one: 'one',
  two: 'two',
  three: 'three',
  toString: () => {
    out="";
    for (var s in this)
    {
      if (typeof s == 'string')
      {
        out+=s
      }
      else
      {
        out+=s.toString()
      }
    }
  }
}

Tests:

toString
obj.toString();
concatenation
obj+"";