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const EventEmitterNative = require("events").EventEmitter;
const TypedEmitter = require("tiny-typed-emitter").TypedEmitter;
const EventEmitter3 = require("eventemitter3").EventEmitter;
import { bench, run } from "mitata";
const event = new Event("hello");
var id = 0;
for (let [EventEmitter, className] of [
[EventEmitterNative, "EventEmitter"],
[TypedEmitter, "TypedEmitter"],
[EventEmitter3, "EventEmitter3"],
]) {
const emitter = new EventEmitter();
emitter.on("hello", (event) => {
event.preventDefault();
});
bench(`${className}.emit`, () => {
emitter.emit("hello", {
preventDefault() {
id++;
},
});
});
bench(`${className}.on x 10_000 (handler)`, () => {
var cb = (event) => {
event.preventDefault();
};
emitter.on("hey", cb);
var called = false;
for (let i = 0; i < 10_000; i++)
emitter.emit("hey", {
preventDefault() {
id++;
called = true;
},
});
emitter.off("hey", cb);
if (!called) throw new Error("not called");
});
if (EventEmitter !== EventEmitter3) {
var monkey = Object.assign({}, EventEmitter.prototype);
monkey.on("hello", (event) => {
event.preventDefault();
});
bench(`[monkey] ${className}.emit`, () => {
var called = false;
monkey.emit("hello", {
preventDefault() {
id++;
called = true;
},
});
if (!called) {
throw new Error("monkey failed");
}
});
bench(`[monkey] ${className}.on x 10_000 (handler)`, () => {
var cb = () => {
event.preventDefault();
};
monkey.on("hey", cb);
for (let i = 0; i < 10_000; i++)
monkey.emit("hey", {
preventDefault() {
id++;
},
});
monkey.off("hey", cb);
});
}
}
var target = new EventTarget();
target.addEventListener("hello", (event) => {});
bench("EventTarget.dispatch", () => {
target.dispatchEvent(event);
});
var hey = new Event("hey");
bench("EventTarget.on x 10_000 (handler)", () => {
var handler = (event) => {};
target.addEventListener("hey", handler);
for (let i = 0; i < 10_000; i++) target.dispatchEvent(hey);
target.removeEventListener("hey", handler);
});
await run();
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