Run results for: Object.assign vs spread operator

Run details:

User agent: Mozilla/5.0 (Linux; Android 8.1.0; CPH1853 Build/OPM1.171019.026; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/68.0.3440.91 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/219.0.0.46.114;]

Browser: Chrome Mobile 68

Operating system: Android 8.1.0

Device Platform: Mobile

Date tested: 5 years ago

Test name	Executions per second
Object.assign	497310.8 Ops/sec
spread operator	293480.9 Ops/sec
jQuery extend	0.0 Ops/sec
Manual Update	67588504.0 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