Run results for: Object.assign vs direct assignment

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 11_0_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.72 Safari/537.36

Browser: Chrome 89

Operating system: Mac OS X 11.0.1

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
Direct Assignment	393.6 Ops/sec
Object.assign	82.2 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 }); }