Benchmark: _.isEmpty vs Object.keys.length vs getOwnPropertyNames vs isEmpty

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;
getOwnPropertyNames
Object.getOwnPropertyNames(window.obj).length === 0;
isEmpty
function isEmpty(obj) { for (var x in obj) { return false; } return true; } return isEmpty(window.object);

Rendered benchmark preparation results:

Previous results

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Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/98.0.4758.82 Safari/537.36

Browser/OS: Chrome 98 on Windows

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