timetest.js

var timeoutLengthInMS = 1;
var c = 0;

function test() {
  var d1 = process.hrtime();

  setTimeout(function() {
    var dd = process.hrtime(d1);
    // convert [sec,ns] to msec
    dd = dd[0] * 1e3 + dd[1]/1e6;
    if (dd < timeoutLengthInMS) {
       throw new Error('expected at least ' + timeoutLengthInMS + ', got ' + dd);
    }
    ++c;
    if (c % 1000 === 0)
      console.log(c);
    test();
  }, timeoutLengthInMS);
}

test();