Speeds controllable stream.
You can control the downstream speed on your own.
$ npm install speedsvar speeds = require('speeds');
var fs = require('fs');
// read data 1 byte per second
var total = 0;
fs.createReadStream(__filename).pipe(speeds(1)).on('data', function (chunk) {
total += chunk.length;
console.log('%s %d/%d bytes', Date(), chunk.length, total);
});