Run results for: Object.assign vs spread operator

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 12_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/15E148 [FBAN/FBIOS;FBDV/iPhone8,2;FBMD/iPhone;FBSN/iOS;FBSV/12.2;FBSS/3;FBCR/Viettel;FBID/phone;FBLC/en_US;FBOP/5]

Browser: Mobile Safari 12

Operating system: iOS 12.2

Device Platform: Mobile

Date tested: 5 years ago

Test name	Executions per second
Object.assign	2150961.0 Ops/sec
spread operator	919437.8 Ops/sec
jQuery extend	0.0 Ops/sec
Manual Update	36982524.0 Ops/sec

Tests:

Object.assign
var params = { b:"hello", c: true, d:7 }; var other = Object.assign({ a: 2 }, params);
spread operator
var params = { b:"hello", c: true, d:7 }; var other = { a: 2, ...params };
jQuery extend
var params = { b:"hello", c: true, d:7 }; var other = $.extend({ a: 2 }, params);
Manual Update
var params = { b:"hello", c: true, d:7 }; params.a = 2; params.b = "NEW TEXT";

Run results for: Object.assign vs spread operator

Object.assign

spread operator

jQuery extend

Manual Update