Run results for: Cost of destructuring polyfill

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/145.0.0.0 Safari/537.36

Browser: Chrome 145

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 months ago

Test name	Executions per second
destructureAndNewArray	94036992.0 Ops/sec
polyfilledDestructureAndNewArray	35106484.0 Ops/sec
newArray	95292880.0 Ops/sec
mutateArray	96536832.0 Ops/sec

HTML Preparation code:

<!--your preparation HTML code goes here-->

Script Preparation code:

function signal() {
  var a = Math.random(),
    b = Math.random();
  return [
    function () {
      return a;
    },
    function () {
      return b;
    },
  ];
}
function wrap(a) {
  return function () {
    console.log("start");
    var b = a();
    console.log("end");
    return b;
  };
}

function destructureAndNewArray() {
  const [get, set] = signal();
  return [wrap(get), wrap(set)];
}

function c(a) {
  var b = 0;
  return function () {
    return b < a.length ? { done: !1, value: a[b++] } : { done: !0 };
  };
}
function polyfilledDestructureAndNewArray() {
  var a = signal();
  var b = typeof Symbol != "undefined" && Symbol.iterator && a[Symbol.iterator];
  if (b) a = b.call(a);
  else if (typeof a.length == "number") a = { next: c(a) };
  else throw Error(String(a) + " is not an iterable or ArrayLike");
  b = a;
  a = b.next().value;
  b = b.next().value;
  return [wrap(a), wrap(b)];
}
function newArray() {
  var a = signal();
  return [wrap(a[0]), wrap(a[1])];
}
function mutateArray() {
  var a = signal();
  a[0] = wrap(a[0]);
  a[1] = wrap(a[1]);
  return a;
}

Tests:

destructureAndNewArray
destructureAndNewArray();
polyfilledDestructureAndNewArray
polyfilledDestructureAndNewArray();
newArray
newArray();
mutateArray
mutateArray();

Run results for: Cost of destructuring polyfill

http://shortn/_phn0vruuxP

destructureAndNewArray

polyfilledDestructureAndNewArray

newArray

mutateArray