Run results for: Object.setPrototypeOf vs Proxy - property access (with baseline)

Test name	Executions per second
✓ baseline class	1,269,466,368 Ops/sec
Object.setPrototypeOf	1,261,088,896 Ops/sec
Proxy	2,369,609 Ops/sec

Script Preparation code:

 class Car {
     constructor(make, model, year, mileage = 0, fuelLevel = 100) {
         this.make = make;
         this.model = model;
         this.year = year;
         this.mileage = mileage;
         this.fuelLevel = fuelLevel;
     }

     start() {
         console.log(`${this.make} ${this.model} is starting...`);
     }

     stop() {
         console.log(`${this.make} ${this.model} is stopping...`);
     }

     drive(distance) {
         if (this.fuelLevel > 0) {
             this.mileage += distance;
             this.fuelLevel -= distance * 0.05; // Assuming 1 unit of fuel per 20 miles
             console.log(`You drove ${distance} miles. Mileage is now ${this.mileage} miles.`);
         } else {
             console.log('Not enough fuel to drive.');
         }
     }

     refuel(amount) {
         this.fuelLevel += amount;
         console.log(`Refueled ${amount}%. Fuel level is now ${this.fuelLevel}%.`);
     }

     getCarInfo() {
         return `${this.year} ${this.make} ${this.model}, Mileage: ${this.mileage} miles, Fuel Level: ${this.fuelLevel}%`;
     }
 }

 function createCar() {

     return new Car('Toyota', 'Corolla', 2021, 5000, 100);
 }

 function createProperties() {
     return {
         make: 'Toyota',
         model: 'Corolla',
         year: 2021,
         mileage: 5000,
         fuelLevel: 100
     }
 }

 function createProto() {
     return {
         start: function() {
             console.log(`${this.make} ${this.model} is starting...`);
         },

         stop: function() {
             console.log(`${this.make} ${this.model} is stopping...`);
         },

         drive: function(distance) {
             if (this.fuelLevel > 0) {
                 this.mileage += distance;
                 this.fuelLevel -= distance * 0.05; // Assuming 1 unit of fuel per 20 miles
                 console.log(`You drove ${distance} miles. Mileage is now ${this.mileage} miles.`);
             } else {
                 console.log('Not enough fuel to drive.');
             }
         },

         refuel: function(amount) {
             this.fuelLevel += amount;
             console.log(`Refueled ${amount}%. Fuel level is now ${this.fuelLevel}%.`);
         },

         getCarInfo: function() {
             return `${this.year} ${this.make} ${this.model}, Mileage: ${this.mileage} miles, Fuel Level: ${this.fuelLevel}%`;
         }
     }
 }

 function extendTarget(target, proto) {
     Object.setPrototypeOf(proto, Object.getPrototypeOf(target))
     Object.setPrototypeOf(target, proto)
     return target
 }

 function createProxy(target) {
     return new Proxy(target, {
         get(target, key, receiver) {
             if (key in target)
                 return Reflect.get(target, key, receiver)
         },
         set(target, key, value, receiver) {
             target[key] = value;
             return true;
         }
     })
 }

 const proxy = createProxy(createCar())

 function getProxy() {
     return proxy
 }

 const extended = extendTarget(createProperties(), createProto())

 function getExtendedObject() {
     return extended
 }

 const obj = createCar()

 function getCar() {
     return obj
 }

Tests:

Object.setPrototypeOf
const object = getExtendedObject() object.drive object.start object.stop object.refuel object.getCarInfo object.make object.model object.year object.mileage object.fuelLevel
Proxy
const object = getProxy() object.drive object.start object.stop object.refuel object.getCarInfo object.make object.model object.year object.mileage object.fuelLevel
baseline class
const object = getCar() object.drive object.start object.stop object.refuel object.getCarInfo object.make object.model object.year object.mileage object.fuelLevel

Run results for: Object.setPrototypeOf vs Proxy - property access (with baseline)

Object.setPrototypeOf

Proxy

baseline class