Run results for: JSON with and without filter

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.116 Safari/537.36

Browser: Chrome 53

Operating system: Mac OS X 10.10.5

Device Platform: Other

Date tested: 8 years ago

Test name	Executions per second
Plain JSON stringify	4207.6 Ops/sec
With filter	2551.9 Ops/sec

Script Preparation code:

var bigdata = {};
for (var i = 0; i < 100; i++) {
  var usdata = {
    name: 'user' + i,
    surname: 'user' + i,
    friends: {}
  };

  for (var j = 0; j < 10; j++) {
    usdata.friends['friend' + j] = {
      _ref: 'firend' + j
    };
  }

  bigdata['user' + i] = usdata;
}

Tests:

Plain JSON stringify
var str = JSON.stringify(bigdata);
With filter
var str = JSON.stringify(bigdata, function(k,v) { return (k.charAt(0) == '$') ? undefined : v; });

Run results for: JSON with and without filter

Plain JSON stringify

With filter