Run results for: Performance : Object.assign vs Spread operator vs Vanilla

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.98 Safari/537.36

Browser: Chrome 71

Operating system: Mac OS X 10.14.1

Device Platform: Desktop

Date tested: 5 years ago

Tests:

Object.assign
var params = { b:"hello", c: true, d:7, e: ['foo', 'bar'] }; var other = Object.assign({ a: 2 }, params);
Spread Operator
var params = { b:"hello", c: true, d:7, e: ['foo', 'bar'] }; var other = { a: 2, ...params };
Vanilla Update
var params = { b:"hello", c: true, d:7, e: ['foo', 'bar'] }; params.a = 2; params.b = "NEW TEXT"; params.c = false; params.d = 10; params.e[0] = 'bar'; params.e[1] = 'foo';