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

Run details:

User agent: Mozilla/5.0 (X11; Linux i686; rv:67.0) Gecko/20100101 Firefox/67.0

Browser: Firefox 67

Operating system: Linux

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
_.isEmpty	4361787.0 Ops/sec
Object.keys().length	926032.8 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: