Run results for: destructing vs mutating for large objects

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36

Browser: Chrome 130

Operating system: Linux

Device Platform: Desktop

Date tested: one year ago

mutating

156.2M/s

destructing

50.8M/s

View exact numbers

Test name	Executions per second
✓ mutating	156,181,104 Ops/sec
destructing	50,795,684 Ops/sec

Script Preparation code:

var obj = {
        "refEntityId": {
          "entityType": "DEVICE",
          "id": "6c273f20-034a-11f0-88b9-d3b4c2c0424f"
        },
        "refEntityKey": {
          "key": "ALL_ERRORS_COUNT",
          "type": "TS_LATEST"
        },
        "defaultValue": "0"
      }

Tests:

mutating
obj.refEntityId.id = null;
destructing
const result = { ...obj, refEntityId: { ...obj.refEntityId, id: null } };