Run results for: Object.assign vs foreach set

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:134.0) Gecko/20100101 Firefox/134.0

Browser: Firefox 134

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Benchmark engine: Benchmark.js

foreach

18.8M/s

Object.assign

14.9M/s

spread operator

9.8M/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]; });