Run results for: test spread baby

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:103.0) Gecko/20100101 Firefox/103.0

Browser: Firefox 103

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
spread	1066255.8 Ops/sec
assign	1068304.6 Ops/sec

Script Preparation code:

window.obj = {
    title: "hello",
    id: "1",
    someArray: [
        {
            id: "1"
        }
    ],
    someOtherThing1: "blah",
    someOtherThing2: "blah",
    someOtherThing3: "blah",
    someOtherThing4: "blah",
    someOtherThing5: "blah",
    someOtherThing6: "blah",
    someOtherThing7: "blah",
    someOtherThing8: "blah",
    someOtherThing9: "blah",
    someOtherThing10: "blah",
    someOtherThing11: "blah",
    someOtherThing12: "blah",
    someOtherThing13: "blah",
    someOtherThing14: "blah",
    someOtherThing15: "blah",
    someOtherThing16: "blah",
    someOtherThing17: "blah",
    someOtherThing18: "blah",
    someOtherThing19: "blah",
    someOtherThing20: "blah",
    someOtherThing21: "blah",
    someOtherThing22: "blah",
    someOtherThing23: "blah",
    someOtherThing24: "blah",
    someOtherThing25: "blah",
    someOtherThing26: "blah",
    someOtherThing27: "blah",
    someOtherThing28: "blah",
};

window.arr = [];

Tests:

spread
window.arr.length = 0; const newObj = {...window.obj}; window.arr.push(newObj);
assign
window.arr.length = 0; const newObj = Object.assign({}, window.obj); window.arr.push(newObj);

Run results for: test spread baby

spread

assign