Anonymous function vs Object reference Performance

anonvsref.js

const NS_PER_SEC = 1e9;
const elapsedTimeMs = diff => (((diff[0] * NS_PER_SEC) + diff[1]) / 1e6);

const testCount = 1000;
const calcResults = (t, heapMem) => console.log("Average Elapsed Time:", (total / testCount).toFixed(2), "ms", "\nHeap Used Memory:", (heapMem / 1e6).toFixed(2), "MB");


let mem = process.memoryUsage();
// anon function :(
const obj = {};
console.log("ANON FUNCTIONS: ");
let total = 0;
let j = 0;
while(j < testCount) {
	let  i = 10000;
	const timeStart = process.hrtime();
	while(i--) {
		obj.method = () => "helloo";
	}
	total += elapsedTimeMs(process.hrtime(timeStart));
	j++;
}

mem = process.memoryUsage().heapUsed - mem.heapUsed;
calcResults(total, mem);


// object and ref
function methodTest() {
	return "hello";
}
const obj2 = {};
console.log("FUNCTION REF AND OBJECT: ");
total = 0;
j = 0;
while(j < testCount) {
	let  i = 10000;
	const timeStart = process.hrtime();
	while(i--) {
		obj2.method = {m: methodTest, p: ["hell", "yeah"]};
	}
	total += elapsedTimeMs(process.hrtime(timeStart));
	j++;
}
calcResults(total, process.memoryUsage().heapUsed - mem);