Run results for: _.isEmpty vs Object.keys.length

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.102 Safari/537.36 OPR/57.0.3098.116

Browser: Opera 57

Operating system: Mac OS X 10.13.2

Device Platform: Desktop

Date tested: 5 years ago

Test name	Executions per second
_.isEmpty	155744.9 Ops/sec
Object.keys().length	171539.4 Ops/sec

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;
}

Tests:

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

Run results for: _.isEmpty vs Object.keys.length

_.isEmpty

Object.keys().length