HackerRank Javascript stdin using an ES6 generator and larger buffer

gistfile1.txt

'use strict';

function* Lines( stream ) {
    const EOL   = require('os').EOL;
    const Fs    = require('fs');
    const buf   = new Buffer(1024);

    while (Fs.readSync(stream.fd, buf, 0, buf.length)) {
        let lines   = buf.toString().split( EOL );
        if (lines.length < 1) { break; }

        for (let idex in lines) {
            yield lines[idex];
        }
    }
}

const lines = Lines( process.stdin );
for (let T = 0, end = parseInt( lines.next().value ); T < end; T++) {
    let N   = parseInt( lines.next().value );

    // Do your work here.
    console.log("%d", N);
}