Benchmark: Object.assign vs spread operator vs mutation

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 };
Mutation
var params = { b:"hello", c: true, d:7 }; params.a = 2

Rendered benchmark preparation results:

Previous results

ⓘ Get performance results from real users on your website with Request Metrics.

Latest run results:

Run details: (Test run date: 5 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3602.2 Safari/537.36

Browser/OS: Chrome 72 on Windows

Object.assign vs spread operator vs mutation (version: 0)