Object is Empty: benchmark ways

isEmptyObject.js

const Benchmark = require('benchmark');
const isEmpty = require('lodash/isEmpty');

const suite = new Benchmark.Suite();

console.log('benchmark');

const emptyObj = {};
const nonEmptyObj = { key: 'value' };

suite
  .add('Object.keys', function() {
    Object.keys(emptyObj).length === 0;
  })
  .add('for...in Loop', function() {
    for (const key in emptyObj) {
      if (emptyObj.hasOwnProperty(key)) {
        return false;
      }
    }
    return true;
  })
  .add('Object.getOwnPropertyNames', function() {
    Object.getOwnPropertyNames(emptyObj).length === 0;
  })
  .add('JSON.stringify', function() {
    JSON.stringify(emptyObj) === '{}';
  })
  .add('isEmpty', function() {
    isEmpty(emptyObj);
  })
  // Add more methods to benchmark here
  .on('cycle', function(event) {
    console.log(String(event.target));
  })
  .run({ async: true });

/*
Chip: Apple M1 Max
Memopry: 32 GB
*/

/*
Object.keys x 177,339,177 ops/sec ±0.65% (94 runs sampled)
for...in Loop x 111,380,046 ops/sec ±0.36% (100 runs sampled)
Object.getOwnPropertyNames x 171,856,296 ops/sec ±1.08% (97 runs sampled)
JSON.stringify x 19,808,391 ops/sec ±0.36% (97 runs sampled)
isEmpty x 74,750,856 ops/sec ±0.21% (99 runs sampled)
*/