tests.swift

let encoder = JSONEncoder()
let decoder = JSONDecoder()

struct User: Codable {
    let id: Int
    let name: String
    let age: Double
    let roles: [String]
    let awesome: Bool
}

let joannis = User(id: 0, name: "Joannis", age: 22.5, roles: ["admin", "coder"], awesome: true)

for _ in 0..<100_000 {
    _ = try encoder.encode(joannis)
}

let user = try encoder.encode(joannis)

for _ in 0..<100_000 {
    _ = try decoder.decode(User.self, from: user)
}

let me = try decoder.decode(User.self, from: user)
print(me)