Run results for: Object.assign vs copying object keys

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/15.3 Safari/605.1.15

Browser: Safari 15

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
Object.assign	613.8 Ops/sec
Copy object keys	679.8 Ops/sec

Tests:

Object.assign
const source = {}; for( let i = 0; i < 10000; i++ ) { source[ i ] = 'Lorem ipsum dolor nabet'; } const target = {}; Object.assign( target, source );
Copy object keys
const source = {}; for( let i = 0; i < 10000; i++ ) { source[ i ] = 'Lorem ipsum dolor nabet'; } const target = {}; Object.keys( source ).forEach( key => { target[ key ] = source[ key ]; } );