Run results for: lodash vs deepmerge vs deepmerge-ts vs ts-deepmerge

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 Safari/537.36

Browser: Chrome 135

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Benchmark engine: Benchmark.js

ts-deepmerge

483K/s

deepmerge

333K/s

deepmerge-ts

219K/s

lodash

103K/s

View exact numbers

Test name	Executions per second
✓ ts-deepmerge	482,655 Ops/sec
deepmerge	333,326 Ops/sec
deepmerge-ts	219,153 Ops/sec
lodash	102,898 Ops/sec

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.6.2/lodash.min.js'></script>
<script src='https://unpkg.com/deepmerge@4.2.2/dist/umd.js'></script>
<script type="module">
import { deepmerge } from 'https://unpkg.com/deepmerge-ts@4.2.1/dist/node/index.mjs';
import { merge as tsDeepmerge } from 'https://unpkg.com/ts-deepmerge@7.0.0/esm/index.js';
window.deepmergeTs = deepmerge;
window.tsDeepmerge = tsDeepmerge;
</script>

Tests:

lodash
var a = { a: 'oh', b: 'my', c: { a: 'a', b: { c: 'c' } } }; var b = { c: { b: { d: 'a' }, c: { d: 'd' } } }; var c = _.merge({}, a, b); const x = { foo: { bar: 3 }, array: [{ does: 'work', too: [ 1, 2, 3 ] }] } const y = { foo: { baz: 4 }, quux: 5, array: [{ does: 'work', too: [ 4, 5, 6 ] }, { really: 'yes' }] } var z = _.merge({}, x, y);
deepmerge
var a = { a: 'oh', b: 'my', c: { a: 'a', b: { c: 'c' } } }; var b = { c: { b: { d: 'a' }, c: { d: 'd' } } }; var c = deepmerge({}, a, b); const x = { foo: { bar: 3 }, array: [{ does: 'work', too: [ 1, 2, 3 ] }] } const y = { foo: { baz: 4 }, quux: 5, array: [{ does: 'work', too: [ 4, 5, 6 ] }, { really: 'yes' }] } var z = deepmerge({}, x, y);
deepmerge-ts
var a = { a: 'oh', b: 'my', c: { a: 'a', b: { c: 'c' } } }; var b = { c: { b: { d: 'a' }, c: { d: 'd' } } }; var c = deepmergeTs({}, a, b); const x = { foo: { bar: 3 }, array: [{ does: 'work', too: [ 1, 2, 3 ] }] } const y = { foo: { baz: 4 }, quux: 5, array: [{ does: 'work', too: [ 4, 5, 6 ] }, { really: 'yes' }] } var z = deepmergeTs({}, x, y);
ts-deepmerge
var a = { a: 'oh', b: 'my', c: { a: 'a', b: { c: 'c' } } }; var b = { c: { b: { d: 'a' }, c: { d: 'd' } } }; var c = tsDeepmerge({}, a, b); const x = { foo: { bar: 3 }, array: [{ does: 'work', too: [ 1, 2, 3 ] }] } const y = { foo: { baz: 4 }, quux: 5, array: [{ does: 'work', too: [ 4, 5, 6 ] }, { really: 'yes' }] } var z = tsDeepmerge({}, x, y);