Run results for: toString vs concatenation

Run details:

User agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:80.0) Gecko/20100101 Firefox/80.0

Browser: Firefox 80

Operating system: FreeBSD

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
toString	851506.9 Ops/sec
concatenation	588701.7 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+"";