Benchmark: JSON.stringify vs structuredClone vs _.cloneDeep

HTML Preparation code:

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

Script Preparation code:

var MyObject = {
  description: 'Creates a deep copy of source, which should be an object or an array.',
  myNumber: 123456789,
  myBoolean: true,
  jayson: {
    stringify: 'JSON.stringify() method converts a JavaScript value to a JSON string....',
    parse: 'JSON.parse() method parses a JSON string...'
  }
};

var myCopy = null;

Tests:

JSON.stringify
myCopy = JSON.parse(JSON.stringify(MyObject));
structuredClone
myCopy = structuredClone(MyObject);
_.cloneDeep
myCopy = _.cloneDeep(MyObject);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
JSON.stringify
structuredClone
_.cloneDeep

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 12 days ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36

Browser/OS: Chrome 124 on Windows

View result in a separate tab

Test name	Executions per second
JSON.stringify	925603.8 Ops/sec
structuredClone	529112.8 Ops/sec
_.cloneDeep	1608182.0 Ops/sec

JSON.stringify vs structuredClone vs _.cloneDeep (version: 0)

JSON.stringify vs structuredClone vs _.cloneDeep

Comparing performance of: JSON.stringify vs structuredClone vs _.cloneDeep

Created: 12 days ago by: Guest

Jump to the latest result

JSON.stringify

structuredClone

_.cloneDeep

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A