Run results for: isFunction vs typeof function 5

Run details:

User agent: Mozilla/5.0 (Linux; Android 11; M2101K9AG) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/98.0.4758.102 Mobile Safari/537.36 EdgA/98.0.1108.55

Browser: Chrome Mobile 98

Operating system: Android

Device Platform: Mobile

Date tested: 2 years ago

Test name	Executions per second
isFunction	3412482.0 Ops/sec
typeof function	1088758000.0 Ops/sec
instanceof	3820715.0 Ops/sec

HTML Preparation code:

<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.core.js"></script>

Tests:

isFunction
function onClose () { console.log('hey') } var isfunc = _.isFunction(onClose);
typeof function
function onClose () { console.log('hey') } var isfunc = typeof onClose === 'function';
instanceof
function onClose () { console.log('hey') } var isfunc = onClose instanceof Function;

Run results for: isFunction vs typeof function 5

isFunction vs typeof function

isFunction

typeof function

instanceof