Run results for: Object.assign vs direct assignment

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:151.0) Gecko/20100101 Firefox/151.0

Browser: Firefox 151

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: 2 months ago

Direct Assignment

1K/s

Object.assign

704/s

View exact numbers

Test name	Executions per second
✓ Direct Assignment	1,181 Ops/sec
Object.assign	704 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 }); }