Benchmark: _.isEmpty vs Object.keys.length vs for in

HTML Preparation code:

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.4/lodash.min.js"></script>

Script Preparation code:

window.obj = {};

for (var i = 0, len = 100; i < len; i++) {
  obj['key' + i] = 'value' + i;
}

function isEmpty(obj) { 
   for (let x in obj) { return false; }
   return true;
}

Tests:

_.isEmpty
_.isEmpty(window.obj);
Object.keys().length
Object.keys(window.obj).length === 0;
isEmpty(window.obj)
isEmpty(window.obj)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
_.isEmpty
Object.keys().length
isEmpty(window.obj)

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/99.0.4844.74 Safari/537.36 Edg/99.0.1150.55

Browser/OS: Chrome 99 on Windows

View result in a separate tab

Test name	Executions per second
_.isEmpty	3089398.0 Ops/sec
Object.keys().length	798597.3 Ops/sec
isEmpty(window.obj)	4562369.0 Ops/sec

_.isEmpty vs Object.keys.length vs for in (version: 0)

Comparing performance of: _.isEmpty vs Object.keys().length vs isEmpty(window.obj)

Created: one year ago by: Guest

Jump to the latest result

_.isEmpty

Object.keys().length

isEmpty(window.obj)

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A