Benchmark: Object.assign vs JSON Clone

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 clone
myCopy = JSON.parse(JSON.stringify(MyObject));
Object.assign
myCopy = Object.assign({}, MyObject);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Json clone
Object.assign

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Linux; Android 13; 21081111RG) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/112.0.0.0 Mobile Safari/537.36

Browser/OS: Chrome Mobile 112 on Android

View result in a separate tab

Test name	Executions per second
Json clone	343241.3 Ops/sec
Object.assign	2060428.0 Ops/sec

Object.assign vs JSON Clone (version: 0)

Comparing performance of: Json clone vs Object.assign

Created: 2 years ago by: Guest

Jump to the latest result

Json clone

Object.assign

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A