Run results for: isFunction vs typeof function 6

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36

Browser: Chrome 120

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

typeof function

13.7M/s

instanceof

7.8M/s

wrapped typeof function (like optimized _.isFunction)

7.6M/s

isFunction

7.5M/s

View exact numbers

Test name	Executions per second
✓ typeof function	13,722,724 Ops/sec
instanceof	7,811,905 Ops/sec
wrapped typeof function (like optimized _.isFunction)	7,580,137 Ops/sec
isFunction	7,473,842 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>

Script Preparation code:

window.sample = function () {};
window.$isFunction = function (v) { return typeof v === 'function'; };

Tests:

isFunction
var isfunc = _.isFunction(sample);
typeof function
var isfunc = typeof sample === 'function';
instanceof
var isfunc = sample instanceof Function;
wrapped typeof function (like optimized _.isFunction)
var isfunc = $isFunction(sample);