class ValueHolder {

  #value;

  get value() {return this.#value;}

  set value(v) {this.#value = v;}

}

const holder = new ValueHolder();

​

function getValue1(x) {

  return holder.value;

}

function wrappedValue1(x) { return getValue1(x); }

​

function getValue2(x, anyHolder=holder) {

  return anyHolder.value;

}

function wrappedValue2(x) { return getValue2(x); }

​

function getValue3(x, anyHolder=holder) {

  const propName = "value";

  return anyHolder[propName];

}

function wrappedValue3(x) { return getValue3(x); }

​

function getValue4(x, anyHolder=holder, propName="value") {

  return anyHolder[propName];

}

function wrappedValue4(x) { return getValue1(4); }

function benchmark(func) {

  let x; 

  for (let i = 0; i < 1000000; i++) {

    x = func(i);

  }

  return x;

}