A stream that can mimic network latency.
npm install latency-stream
const LatencyStream = require('latency-stream')
const latency = new LatencyStream(100) // add a 100ms of latency
someStream.pipe(latency).pipe(someDestination)
You can also set an interval of latency and it will pick a random number inbetween
const latency = new LatencyStream([100, 200]) // add between 100-200 ms of latency
MIT