Run results for: Reflect.construct vs new and setPrototypeOf

Run details:

User agent: Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Mobile Safari/537.36

Browser: Chrome Mobile 131

Operating system: Android

Device Platform: Mobile

Date tested: one year ago

Benchmark engine: Benchmark.js

new and setPrototypeOf

2.8M/s

Reflect.construct

2.2M/s

View exact numbers

Test name	Executions per second
✓ new and setPrototypeOf	2,811,236 Ops/sec
Reflect.construct	2,154,908 Ops/sec

Script Preparation code:

function A() {}
A.prototype.x = 10;

function B() {
  const a = new A()
  Object.setPrototypeOf(a, B.prototype)
}
B.prototype.y = 11;


function C() {
  const a = Reflect.construct(A, [], C)
}
C.prototype.z = 12;

Tests:

new and setPrototypeOf
new B()
Reflect.construct
new C()