Run results for: Fastest way to check if an object with potentially lots of data is empty

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/118.0.0.0 Safari/537.36

Browser: Chrome 118

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
object.keys()	1197.7 Ops/sec
JSON.stringify()	619.5 Ops/sec
_.isEmpty()	1203.6 Ops/sec
for ... in	1198.1 Ops/sec

HTML Preparation code:


<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

Script Preparation code:

const arr = [];

for(i = 0; i < 10000; i++)
{
    arr.push([`key_${i}`, `val_${i}`]);
}

var obj = Object.fromEntries(arr);

var isObjectEmpty = (objectName) => {
  for (let prop in objectName) {
    if (objectName.hasOwnProperty(prop)) {
      return false;
    }
  }
  return true;
};

Tests:

object.keys()
Object.keys(obj) === 0
JSON.stringify()
JSON.stringify(obj) === "{}"
_.isEmpty()
_.isEmpty(obj) === true
for ... in
isObjectEmpty(obj) === true

Run results for: Fastest way to check if an object with potentially lots of data is empty

You don't need to make add for loops in your test scenarios, the benchmark does it itself.

object.keys()

JSON.stringify()

_.isEmpty()

for ... in