Run results for: Compare lodash isEmpty and length comparison on arrays, stings and custom function isEmpty

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:128.0) Gecko/20100101 Firefox/128.0

Browser: Firefox 128

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: 4 months ago

Test name	Executions per second
isEmpty empty array	5347750.0 Ops/sec
length empty array	8182340.0 Ops/sec
custom isEmpty empty array	5928101.5 Ops/sec
isEmpty array of strings	5099799.0 Ops/sec
length array of strings	7927615.5 Ops/sec
custom isEmpty array of strings	3537372.5 Ops/sec
isEmpty array of objects	5137556.0 Ops/sec
length empty array of objects	8114858.5 Ops/sec
custom isEmpty array of objects	5826167.0 Ops/sec
isEmpty empty string	6596802.0 Ops/sec
length empty string	7444999.0 Ops/sec
custom isEmpty empty string	4922654.0 Ops/sec
isEmpty filled string	6573739.5 Ops/sec
length filled string	7843720.0 Ops/sec
custom isEmpty filled string	4771349.5 Ops/sec

HTML Preparation code:

<script src="https://cdn.jsdelivr.net/npm/lodash@4.17.4/lodash.min.js"></script>

Script Preparation code:

// empty array
window.foo1 = [];

// array of strings
window.foo2 = ['a', 'b', 'c', 'd', 'e'];

// array of objects
window.foo3 = [{ a: 1, b: 2, c: { a: 1, b: 2, c: { a: 1, b: 2 } } }, { a: 1, b: 2, c: { a: 1, b: 2, c: { a: 1, b: 2 } } }, { a: 1, b: 2, c: { a: 1, b: 2, c: { a: 1, b: 2 } } }];

// empty string
window.foo4 = '';

// filled string
window.foo5 = 'Comparing performance of: isEmpty empty strings vs length empty strings isEmpty filled string vs length filled string';

function isEmpty(value){
  return  value === undefined ||
          value === null ||
          (typeof value === "object" && Object.keys(value).length === 0) ||
          (typeof value === "string" && value.trim().length === 0)
}

Tests:

isEmpty empty array
_.isEmpty(window.foo1);
length empty array
window.foo1.length === 0;
custom isEmpty empty array
isEmpty(window.foo1);
isEmpty array of strings
_.isEmpty(window.foo2);
length array of strings
window.foo2.length === 0;
custom isEmpty array of strings
isEmpty(window.foo2);
isEmpty array of objects
_.isEmpty(window.foo3);
length empty array of objects
window.foo3.length === 0;
custom isEmpty array of objects
isEmpty(window.foo3);
isEmpty empty string
_.isEmpty(window.foo4);
length empty string
window.foo4.length === 0;
custom isEmpty empty string
isEmpty(window.foo4);
isEmpty filled string
_.isEmpty(window.foo5);
length filled string
window.foo5.length === 0;
custom isEmpty filled string
isEmpty(window.foo5);

Run results for: Compare lodash isEmpty and length comparison on arrays, stings and custom function isEmpty

isEmpty empty array

length empty array

custom isEmpty empty array

isEmpty array of strings

length array of strings

custom isEmpty array of strings

isEmpty array of objects

length empty array of objects

custom isEmpty array of objects

isEmpty empty string

length empty string

custom isEmpty empty string

isEmpty filled string

length filled string

custom isEmpty filled string