Run results for: Lodash cloneDeep vs structuredClone vs JSON.stringify/parse 2

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/143.0.0.0 Safari/537.36

Browser: Chrome 143

Operating system: Windows

Device Platform: Desktop

Date tested: 7 months ago

JSON.stringify / parse

64K/s

Native structuredClone

54K/s

Lodash cloneDeep

26K/s

View exact numbers

Test name	Executions per second
✓ JSON.stringify / parse	64,496 Ops/sec
Native structuredClone	54,010 Ops/sec
Lodash cloneDeep	26,430 Ops/sec

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

Script Preparation code:



const data = {
  id: crypto.randomUUID(),
  timestamp: new Date(),
  nested: {
    numbers: Array.from({ length: 1000 }, (_, i) => i),
    text: "Some sample text content ".repeat(10),
    tags: new Set(['performance', 'benchmark', '2025']),
    mapping: new Map([['key1', 'val1'], ['key2', 'val2']])
  }
};

Tests:

Lodash cloneDeep
_.cloneDeep(data);
Native structuredClone
structuredClone(data);
JSON.stringify / parse
myCopy = JSON.parse(JSON.stringify(data));

Run results for: Lodash cloneDeep vs structuredClone vs JSON.stringify/parse 2

https://developer.mozilla.org/en-US/docs/Web/API/structuredClone

Lodash cloneDeep

Native structuredClone

JSON.stringify / parse