"Eternal" process setInterval vs setTimeout?

Question

JavaScript

The task is to periodically receive information from the remote api on the server with a certain time interval. The process itself will start with the server:

http.createServer(app).listen(PORT, function () {
   runForrestRun();
 });

function runForrestRun() {
    shared.timeoutId = setTimeout(
        function () {
            console.log("Hello");
        },
        shared.timeout);
}

At the same time, you need to be able to stop this process, start it again or change the time interval through api, for example like this (I did not check the performance of the first two endpoints)

const shared = require('./shared');
const handler = require('./handler');

// start process
router.post('/api/start', function (request, response) {
    runForrestRun();
    handler.success(response, 'ok');
});

// stop process
router.post('/api/stop', function (request, response) {
    clearTimeout(shared.timeoutId);
    handler.success(response, 'ok');
});

// update timeout interval
router.post('/api/timeout', function (request, response) {
    shared.timeout = request.body.timeout;
    handler.success(response, 'ok');
});

// get current timeout interval
router.get('/api/timeout', function (request, response) {
    handler.success(response, '', shared.timeout);
});

Another similar task is to notify users about something by mail or on the site (although this particular case is not about mail) Which is better setInterval or setTimeout in such cases? Or are there other better technologies out there?

Answer 1

The question is not fully resolved, but for now I stopped there.