Run results for: Object.assign vs spread operator

Run details:

User agent: Mozilla/5.0 (Linux; Android 7.0; Redmi Note 4X Build/NRD90M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/73.0.3683.90 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/219.0.0.46.114;]

Browser: Chrome Mobile 73

Operating system: Android 7.0

Device Platform: Mobile

Date tested: 5 years ago

Test name	Executions per second
Object.assign	611161.9 Ops/sec
spread operator	372669.9 Ops/sec
jQuery extend	0.0 Ops/sec
Manual Update	116969864.0 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