Run results for: Object spread operator vs property assignment

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/132.0.0.0 Safari/537.36

Browser: Chrome 132

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Benchmark engine: Benchmark.js

Property assignment

220.1M/s

Spread operator

86.1M/s

View exact numbers

Test name	Executions per second
✓ Property assignment	220,067,696 Ops/sec
Spread operator	86,145,904 Ops/sec

Tests:

Spread operator
const obj = { a: 1, b: 'two', c: true }; const objExt = { ...obj, b: 2 };
Property assignment
const obj = { a: 1, b: 'two', c: true }; obj.b = 2;