Run results for: underscore isString VS typeof

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/115.0

Browser: Firefox 115

Operating system: Linux

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
underscore check 1	38195124.0 Ops/sec
underscore check 2	16548185.0 Ops/sec
native check 1	405683104.0 Ops/sec
native check 2	405227264.0 Ops/sec

HTML Preparation code:

<script src="https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.13.6/underscore-min.js" integrity="sha512-2V49R8ndaagCOnwmj8QnbT1Gz/rie17UouD9Re5WxbzRVUGoftCu5IuqqtAM9+UC3fwfHCSJR1hkzNQh/2wdtg==" crossorigin="anonymous" referrerpolicy="no-referrer"></script>

Script Preparation code:

var MyObject = {
  description: 'a',
  myNumber: 123456789,
  myBoolean: true,
};
var myString = "abcdef"

var myCopy = null;

Tests:

underscore check 1
myCopy = _.isString(MyObject);
underscore check 2
myCopy = _.isString(myString);
native check 1
myCopy = typeof MyObject === 'string'
native check 2
myCopy = typeof myString === 'string'

Run results for: underscore isString VS typeof

underscore check 1

underscore check 2

native check 1

native check 2