Run results for: test 4bc5a6e8-e19c-46c7-8c39-c70b7152fe4f

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.77 Safari/537.36

Browser: Chrome 70

Operating system: Mac OS X 10.14.1

Device Platform: Desktop

Date tested: 5 years ago

Test name	Executions per second
json.stringify	193128.5 Ops/sec
custom	34290.1 Ops/sec

Script Preparation code:

var date1 =  new Date(Date.parse('2018-11-07'));
window.obj1 = {a: [[], [1], ['1'], [null], {b: 1}, date1]}, {a: [[], [1], ['1'], [null], {b: 1}, date1]};
window.obj2 = {a: [[], [1], ['1'], [null], {b: 1}, date1]}, {a: [[], [1], ['1'], [null], {b: 1}, date1]};



function isFunction(functionToCheck) {
  var getType = {};
  return functionToCheck && getType.toString.call(functionToCheck) === '[object Function]';
}

function objectsAreEqual1(first, second) {
  return JSON.stringify(first) === JSON.stringify(second);
}

function objectsAreEqual2(first, second) {
  if (first === undefined)
    return second === undefined;

  if (first === null)
    return second === null;

  if (second === undefined)
    return first === undefined;

  if (second === null)
    return first === null;

  if (isFunction(first))
    return isFunction(second);

  else if (Array.isArray(first)) {
    if (!Array.isArray(second))
      return false;
    else if (first.length !== second.length)
      return false;

    for (let i = 0; i < first.length; i++) {
      if (!objectsAreEqual2(first[i], second[i]))
        return false;
    }
  }
  else if (first instanceof Date) {
    if (!(second instanceof Date))
      return false;

    return first === second;
  }
  else if (typeof first === 'string') {
    if (typeof second !== 'string')
      return false;
    return first === second;
  }
  else if (typeof first === 'number') {
    if (typeof second !== 'number')
      return false;
    return first === second;
  }

  if (Object.keys(first).length !== Object.keys(second).length)
    return false;

  for (let key in first) {
    if (!(key in second))
      return false;

    if (!objectsAreEqual2(first[key], second[key]))
      return false;
  }
  return true;
}

Tests:

json.stringify
objectsAreEqual1(obj1, obj2)
custom
objectsAreEqual2(obj1, obj2)

Run results for: test 4bc5a6e8-e19c-46c7-8c39-c70b7152fe4f

json.stringify

custom