Benchmark: JSON.stringify vs structuredClone ++

Script Preparation code:

var MyObject = {
    description: 'Creates a deep copy of source, which should be an object or an array.',
    myNumber: 123456789,
    myDate: new Date(),
    myNullishVar: null,
    myUndefinedProp: undefined,
    myInfiniteVar: Infinity,
    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 + parse
myCopy = JSON.parse(JSON.stringify(MyObject));
structuredClone
myCopy = structuredClone(MyObject);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
JSON.stringify + parse
structuredClone

Fastest: N/A

Slowest: N/A

ⓘ Get performance results from real users on your website with Request Metrics.

Website Performance Monitoring by Request Metrics

Latest run results:

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

User agent: Mozilla/5.0 (Android 12; Mobile; rv:109.0) Gecko/111.0 Firefox/111.0

Browser/OS: Firefox Mobile 111 on Android

View result in a separate tab

Test name	Executions per second
JSON.stringify + parse	134558.8 Ops/sec
structuredClone	109259.5 Ops/sec

JSON.stringify vs structuredClone ++ (version: 0)

Comparing performance of: JSON.stringify + parse vs structuredClone

Created: one year ago by: Guest

Jump to the latest result

JSON.stringify + parse

structuredClone

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A