Run results for: Immutable vs Versioned - Equality Check Performance

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36

Browser: Chrome 69

Operating system: Mac OS X 10.14.0

Device Platform: Desktop

Date tested: 5 years ago

Test name	Executions per second
Immutable Check (equal)	1491852.0 Ops/sec
Immutable Check (NOT equal)	1493627.0 Ops/sec
Versioned Check (equal)	1494632.0 Ops/sec
Versioned Check (NOT equal)	1502847.0 Ops/sec
Immutable or Versioned check (equal)	1498158.0 Ops/sec
Immutable or Versioned check (NOT equal)	1490016.0 Ops/sec

Script Preparation code:

function immutableCheck(obj1, obj2) {
	return (obj1 === obj2)
};

function versionedCheck(obj1, obj2) {
	if ((obj1 == null) && (obj2 == null)) return true;
	if ((obj1 != null) && (obj2 != null)) return (obj1._v_ === obj2._v_);
	return false;
};

function immutableOrVersionedCheck(obj1, obj2) {
	if ((obj1 == null) && (obj2 == null)) return true;
	if ((obj1 != null) && (obj2 != null)) {
		if (obj1._v_) return (obj1._v_ === obj2._v_);
		return (obj1 === obj2);
	}
    return false;
};

function optimisationKiller(f, obj1, obj2) {
  	isEqual = 42;
	isEqual = f(obj1, obj2);
	res = isEqual;
}

object1 = { _v_: 1 };
object2 = { _v_: 2 };

Tests:

Immutable Check (equal)
optimisationKiller(immutableCheck, object1, object1);
Immutable Check (NOT equal)
optimisationKiller(immutableCheck, object1, object2);
Versioned Check (equal)
optimisationKiller(versionedCheck, object1, object1);
Versioned Check (NOT equal)
optimisationKiller(versionedCheck, object1, object2);
Immutable or Versioned check (equal)
optimisationKiller(immutableOrVersionedCheck, object1, object1);
Immutable or Versioned check (NOT equal)
optimisationKiller(immutableOrVersionedCheck, object1, object2);

Run results for: Immutable vs Versioned - Equality Check Performance

How much slowed is a versioned equality check than an immutable (reference) equality check?

Immutable Check (equal)

Immutable Check (NOT equal)

Versioned Check (equal)

Versioned Check (NOT equal)

Immutable or Versioned check (equal)

Immutable or Versioned check (NOT equal)