Benchmark: Fastest way to check if an object with potentially lots of data is empty

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

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
object.keys()
JSON.stringify()
_.isEmpty()
for ... in

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 6 months ago)

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/OS: Chrome 118 on Windows

View result in a separate tab

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

Fastest way to check if an object with potentially lots of data is empty (version: 0)

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

Comparing performance of: object.keys() vs JSON.stringify() vs _.isEmpty() vs for ... in

Created: 6 months ago by: Registered User

Jump to the latest result

object.keys()

JSON.stringify()

_.isEmpty()

for ... in

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A