eventemitter-bench.mjs

import { EventEmitter } from "node:events";
import { AsyncEventEmitter } from "@vladfrangu/async_event_emitter";
import benchmark from "benchmark";
import { EventEmitter as EventEmitter3 } from "eventemitter3";
import { Evt } from "evt";

const suite = new benchmark.Suite();

function handle(a) {}

const ee1 = new EventEmitter();
const aee = new AsyncEventEmitter();
const ee3 = new EventEmitter3();
const evt = new Evt();

aee.on("a", handle);
ee1.on("a", handle);
ee3.on("a", handle);
evt.attach(handle);

suite
  .add("node:events", () => {
    ee1.emit("a", "b");
  })
  .add("@vladfrangu/async_event_emitter", () => {
    aee.emit("a", "b");
  })
	.add("eventemitter3", () => {
    ee3.emit("a", "b");
	})
  .add("evt", () => {
    evt.post("b");
  })
  .on('cycle', (event) => {
    console.log(String(event.target));
  })
  .on('complete', function complete() {
    console.log('Fastest is ' + this.filter('fastest').map('name'));
  })
  .run();