Run results for: Shallow copy vs structuredClone

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:139.0) Gecko/20100101 Firefox/139.0

Browser: Firefox 139

Operating system: Windows

Device Platform: Desktop

Date tested: 9 months ago

Test name	Executions per second
Shallow copy	10371631.0 Ops/sec
structuredClone	464315.1 Ops/sec

Script Preparation code:

var MyObject = {
  string: 'string',
  number: 123456789,
  boolean: true,
  obj: {
    stringify: 'string',
    number: '123456789'
  }
};
var copied = undefined;

Tests:

Shallow copy
copied = { ...MyObject }
structuredClone
copied = structuredClone(MyObject)