Run results for: Null assignment vs Condition Check

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/113.0.0.0 Safari/537.36

Browser: Chrome 113

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
Null assignment	1060.3 Ops/sec
Conditional Check	708.3 Ops/sec

Tests:

Null assignment
const obj = {}; for (let i = 0; i < 1000000; i++) { obj.array ??= []; }
Conditional Check
const obj = {}; for (let i = 0; i < 1000000; i++) { if (typeof obj.array === 'undefined') { obj.array = []; } }