Benchmark: JavaScript spread operator vs Object.assign performance for cloning

Tests:

Using the spread operator
const firstObject = { sampleData: 'Hello world', b: 'foo', d: 'dummy' } const clone = { ...firstObject };
Using Object.assign
const firstObject = { sampleData: 'Hello world', b: 'foo', d: 'dummy' } const clone = Object.assign({}, firstObject);

Rendered benchmark preparation results:

Previous results

Test case name	Result
Using the spread operator
Using Object.assign

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Latest run results:

Run details: (Test run date: 6 years ago)

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 11_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/11.0 Mobile/15E148 Safari/604.1

Browser/OS: Mobile Safari 11 on iOS 11.3

Test name	Executions per second
Using the spread operator	292353.2 Ops/sec
Using Object.assign	503474.5 Ops/sec

JavaScript spread operator vs Object.assign performance for cloning (version: 0)