Run results for: Object.assign vs foreach set

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.4.1 Safari/605.1.15

Browser: Safari 17

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

foreach

10.0M/s

spread operator

7.4M/s

Object.assign

3.1M/s

View exact numbers

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 };
foreach
var params = [ ["b", "hello"], ["c", true], ["a", 5] ]; var other = { a: 2 }; params.forEach(style => { other[style[0]] = style[1]; });