Benchmark: JavaScript spread operator vs Object.assign performance vs. Native Assignment

Tests:

Using the spread operator
const firstObject = { sampleData: 'Hello world' }; const secondObject = { moreData: 'foo bar' }; const finalObject = { ...firstObject, ...secondObject };
Using Object.assign
const firstObject = { sampleData: 'Hello world' }; const secondObject = { moreData: 'foo bar' }; const finalObject = Object.assign(firstObject, secondObject);
Using Native assignment.
const firstObject = { sampleData: 'Hello world' }; const secondObject = { moreData: 'foo bar' }; firstObject.moreData = 'foo bar';

Rendered benchmark preparation results:

Previous results

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Latest run results:

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

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.92 Safari/537.36

Browser/OS: Chrome 69 on Mac OS X 10.12.6

JavaScript spread operator vs Object.assign performance vs. Native Assignment (version: 0)