How to Check if an Object is Empty in JavaScript (benchmark)

Using Object.keys()

169,635 ±1.83% 2% slower

function isEmptyObject(obj) {
  return Object.keys(obj).length === 0;
}

Using for...in loop (WON)

172,973 ±0.97% fastest

function isEmptyObject(obj) {
  for (let key in obj) {
    if (obj.hasOwnProperty(key)) {
      return false;
    }
  }
  return true;
}

Using JSON.stringify

164,737 ±0.83% 5% slower

function isEmptyObject(obj) {
  return JSON.stringify(obj) === '{}';
}

Using Object.entries()

169,838 ±1.34% 2% slower

function isEmptyObject(obj) {
  return Object.entries(obj).length === 0;
}

Test of benchmark: https://jsperf.app/govaru

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