const EventEmitter = require('events');
class Emitter extends EventEmitter {
}
const maxIterations = 10;
let iterations = 0;
const timings = [];
const emitter = new Emitter();
const now = () => Date.now();
emitter.on('start', (timing) => {
timing.receive = now();
emitter.emit('end', timing);
});
setInterval(() => {
if (iterations === maxIterations) {
console.dir(timings);
process.exit();
}
emitter.emit('start', { start: now() });
});
emitter.on('end', (timing) => {
iterations++;
timing.end = now();
timings.push(timing);
});