Monitor Node Event Loop

event-loop-test.js

//*********************************************************
//    Quick and dirty way to detect event loop blocking
//*********************************************************
var lastLoop = Date.now();

function monitorEventLoop() {
    var time = Date.now();
    if (time - lastLoop > 1000) console.error('Event loop blocked ' + (time - lastLoop));
    lastLoop = time;
    setTimeout(monitorEventLoop, 200);
}

if (process.env.NODE_ENV === 'development') {
    monitorEventLoop();
}