benchmark-iterable-iteration.ts

import { IsoBench } from "iso-bench";

function* createIterable(count) {
	for (let i = 0; i < count; i++) {
		yield i;
	}
}
declare var i: number;
globalThis.i = 0;

await new IsoBench("generated iterable")
	.add("while", (iterable) => {
		let next = iterable.next();
		while (!next.done) {
			next = iterable.next();
			i = i ^ next.value!;
		}
	}, () => createIterable(100000))
	.add("do while", (iterable) => {  
		let next;
		do {
			next = iterable.next();
			i = i ^ next.value!;
		}
		while(!next.done);
	}, () => createIterable(100000))
	.add("for ... of", (iterable) => {
		for(const value of iterable) {
			i = i ^ value;
		}
	}, () => createIterable(100000))
	.consoleLog().run();


const arr = Array.from({ length: 100000 }, (_, i) => i);


await new IsoBench("array iterable")
	.add("while", (iterable) => {
		let next = iterable.next();
		while (!next.done) {
			next = iterable.next();
			i = i ^ next.value!;
		}
	}, () => arr.values())
	.add("do while", (iterable) => {  
		let next;
		do {
			next = iterable.next();
			i = i ^ next.value!;
		}
		while(!next.done);
	}, () => arr.values())
	.add("for ... of", (iterable) => {
		for(const value of iterable) {
			i = i ^ value;
		}
	}, () => arr.values())
	.consoleLog().run();