Run results for: reference variable vs dotnotation

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/94.0.4606.71 Safari/537.36

Browser: Chrome 94

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
A: use reference	2967802.0 Ops/sec
B: use dot-operator	1893242.0 Ops/sec

Script Preparation code:

window.A = (() => {
	const { assign } = Object;
    return function A(x){assign(this, x);}
})();
window.B = (() => {
	return function B(x){Object.assign(this, x);}
})();

Tests:

A: use reference
A({a: 1})
B: use dot-operator
B({b: 1})

Run results for: reference variable vs dotnotation

A: use reference

B: use dot-operator