Benchmark: JSON.stringify object literals vs class

Tests:

JSON.stringify obj literals
let obj = { name: ['Bob', 'Smith'], age: 32, gender: 'male', interests: ['music', 'skiing'], bio: function () { console.log(this.name[0] + ' ' + this.name[1] + ' is ' + this.age + ' years old. He likes ' + this.interests[0] + ' and ' + this.interests[1] + '.'); }, greeting: function () { console.log('Hi! I\'m ' + this.name[0] + '.'); } }; for (let index = 0; index < 10000; index++) { JSON.stringify(obj); }
JSON.stringfy class instance
class Person { constructor(name, age, gender, interests) { this.name = name; this.age = age; this.gender = gender; this.interests = interests } bio () { console.log(this.name[0] + ' ' + this.name[1] + ' is ' + this.age + ' years old. He likes ' + this.interests[0] + ' and ' + this.interests[1] + '.'); } greeting () { console.log('Hi! I\'m ' + this.name[0] + '.'); } } for (let index = 0; index < 10000; index++) { JSON.stringify(new Person(['Bob', 'Smith'], 32, 'male', ['music', 'skiing'])); }

Rendered benchmark preparation results:

Previous results

Test case name	Result
JSON.stringify obj literals
JSON.stringfy class instance

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Latest run results:

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

User agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.87 Safari/537.36 OPR/54.0.2952.64

Browser/OS: Opera 54 on Windows 7

Test name	Executions per second
JSON.stringify obj literals	51.6 Ops/sec
JSON.stringfy class instance	53.0 Ops/sec

JSON.stringify object literals vs class (version: 0)