Run results for: Object.assign vs spread vs 1 dimensional loop

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.77 Safari/537.36

Browser: Chrome 91

Operating system: Mac OS X 10.14.1

Device Platform: Desktop

Date tested: 2 years ago

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 };
1 Dimensional loop
var params = { b:"hello", c: true, d:7 }; var other = {} for(var prop in params){ other[prop] = params[prop] }