CPU profiling using v8-profiler

cpuProfiling.js

app.get('/doCPUProfiling/profileId/:profileId/durationInSec/:durationInSec', function (req, res) {
    let profileId = req.params['profileId'];
    let durationInMilliSec = req.params['durationInSec'] * 1000;
    // Start profiling
    profiler.startProfiling(profileId);
    setTimeout(function () {
        stopProfiling(profileId);
    }, durationInMilliSec);
    res.json({});
});

var stopProfiling = function(profileId) {
    let profile = profiler.stopProfiling(profileId);
    fs.writeFile(__dirname + '/' + profileId + '.cpuprofile', JSON.stringify(profile), function () {
        console.log('Profiler data written');
    });
}