Run results for: Object.assign vs direct assignment

Run details:

User agent: Mozilla/5.0 (Linux; Android 11; SAMSUNG SM-A705FN) AppleWebKit/537.36 (KHTML, like Gecko) SamsungBrowser/23.0 Chrome/115.0.0.0 Mobile Safari/537.36

Browser: Chrome Mobile 115

Operating system: Android

Device Platform: Mobile

Date tested: 2 years ago

Direct Assignment

149/s

Object.assign

51/s

View exact numbers

Test name	Executions per second
✓ Direct Assignment	149 Ops/sec
Object.assign	51 Ops/sec

Script Preparation code:

var data = {};

Tests:

Direct Assignment
for(var i = 0; i < 10000; i++) { data[`prop_${i}`] = true; }
Object.assign
for(var i = 0; i < 10000; i++) { var propName = `prop_${i}`; Object.assign(data, { [propName]: true }); }