Run results for: Lodash, Underscore, react-fast-compare isEqual test

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

react-fast-compare Level 5

92.4M/s

underscore Level 5

78.9M/s

JSON.stringify Level 5

1.7M/s

lodash Level 5

460K/s

View exact numbers

Test name	Executions per second
✓ react-fast-compare Level 5	92,382,880 Ops/sec
underscore Level 5	78,929,840 Ops/sec
JSON.stringify Level 5	1,742,588 Ops/sec
lodash Level 5	460,205 Ops/sec

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>
<script type="text/javascript">
  window.lodash = _;
  _ = null;
</script>
<script src='https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.9.1/underscore-min.js'></script>
<script type="text/javascript">
  window.underscore = _;
  _ = null;
</script>
<script src="https://cdn.jsdelivr.net/npm/react-fast-compare@latest/index.js"></script>

Script Preparation code:

// 3 levels deep
window.foo3 = { a: 1, b: 2, c: { a: 1, b: 2, c: { a: 1, b: 2 } } };
window.bar3 = { a: 1, b: 2, c: { a: 1, b: 2, c: { a: 1, b: 4 } } };

// 4 levels deep
window.foo4 = { a: 1, b: 2, c: { a: 1, b: 2, c: { a: 1, b: 2, c: { a: 1, b: 2 } } } };
window.bar4 = { a: 1, b: 2, c: { a: 1, b: 2, c: { a: 1, b: 2, c: { a: 1, b: 4 } } } };

// 5 levels deep
window.foo5 = { a: 1, b: 2, c: { a: 1, b: 2, c: { a: 1, b: 2, c: { a: 1, b: 2, c: { a: 1, b: 2 } } } } };
window.bar5 = { a: 1, b: 2, c: { a: 1, b: 2, c: { a: 1, b: 2, c: { a: 1, b: 2, c: { a: 1, b: 4 } } } } };

Tests:

lodash Level 5
lodash.isEqual(window.foo5, window.bar5)
underscore Level 5
underscore.isEqual(window.foo5, window.foo5)
JSON.stringify Level 5
JSON.stringify(window.foo5) === JSON.stringify(window.bar5);
react-fast-compare Level 5
equal(window.foo5, window.foo5)

Run results for: Lodash, Underscore, react-fast-compare isEqual test

Test on isEqual performance

lodash Level 5

underscore Level 5

JSON.stringify Level 5

react-fast-compare Level 5