Benchmark: Object creation: arrow function vs. class with methods

Tests:

Create object by function
const carFactory = (brand, seats) => ({ brand, seats, sound: () => console.log("wrooom") }) for(let i = 0; i < 20; i++) { carFactory(`brand-${i}`, 5) }
Create object by class
class Car { brand; seats; constructor(brand, seats) { this.brand = brand; this.seats = seats; } sound() { return console.log("wrooom") } } for(let i = 0; i < 20; i++) { new Car(`brand-${i}`, 5) }

Rendered benchmark preparation results:

Previous results

Test case name	Result
Create object by function
Create object by class

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Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/112.0

Browser/OS: Firefox 112 on Linux

Test name	Executions per second
Create object by function	81091570.0 Ops/sec
Create object by class	281459.8 Ops/sec

Object creation: arrow function vs. class with methods (version: 0)