Run results for: JSON.parse + JSON.stringify vs structuredClone (cyclical graph)

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/140.0.0.0 Safari/537.36

Browser: Chrome 140

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Benchmark engine: Benchmark.js

JSON

1.2M/s ±1.14%

structuredClone

307K/s ±1.32%

View exact numbers

Test name	Executions per second
✓ JSON	1,238,806 Ops/sec ±1.14%
structuredClone	306,659 Ops/sec ±1.32%

Script Preparation code:

var obj = {
  cycle: {
  	cycle: {
      cycle: {
          cycle: {
            cycle: {
              cycle: {
                cycle: {
                  cycle: 1
                  }
                }
              }
          	}
		  }
		}
	}
}

Tests:

JSON
JSON.parse(JSON.stringify(obj));
structuredClone
structuredClone(obj);