Run results for: alternative this: constructor vs literal

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.90 Safari/537.36

Browser: Chrome 89

Operating system: Windows

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
makeConstructor	835984.8 Ops/sec
makeLiteral	873508.4 Ops/sec
invoke aConstructor	10111645.0 Ops/sec
invoke aLiteral	10260750.0 Ops/sec
invoke prototype method aConstructor	9628953.0 Ops/sec
invoke prototype method aLiteral	10018681.0 Ops/sec
getter aConstructor	10158993.0 Ops/sec
getter aLiteral	10195548.0 Ops/sec

Script Preparation code:

let scopeX = 0;


function Constructor(f) {
  return Object.setPrototypeOf(f, Constructor.prototype);
};
Constructor.prototype = {
  get x() {
    return scopeX;
  },
  y() {
    scopeX = scopeX + 1;
  }
};
Object.setPrototypeOf(Constructor, Function);
Object.setPrototypeOf(Constructor.prototype, Function.prototype);
var makeConstructor = name => new Constructor(({
  [name]() {
    return "My name is\n" + name;
  }
})[name]);
var aConstructor = makeConstructor("Chika-chika\nSlim Shady");


literalPrototype = {
  get x() {
    return scopeX;
  },
  y() {
    scopeX = scopeX + 1;
  }
};
Object.setPrototypeOf(literalPrototype, Function.prototype);
var makeLiteral = name => Object.setPrototypeOf(({
  [name]() {
    return "My name is\n" + name;
  }
})[name], literalPrototype);
var aLiteral = makeConstructor("Chika-chika\nSlim Shady");

Tests:

makeConstructor
const aConstructor = makeConstructor("Chika-chika\nSlim Shady");
makeLiteral
var aLiteral = makeConstructor("Chika-chika\nSlim Shady");
invoke aConstructor
aConstructor();
invoke aLiteral
aLiteral();
invoke prototype method aConstructor
aConstructor.y()
invoke prototype method aLiteral
aLiteral.y();
getter aConstructor
const value = aConstructor.x;
getter aLiteral
const value = aLiteral.x;

Run results for: alternative this: constructor vs literal

makeConstructor

makeLiteral

invoke aConstructor

invoke aLiteral

invoke prototype method aConstructor

invoke prototype method aLiteral

getter aConstructor

getter aLiteral