How to get the response time in node js

Question

Recently I started putting response time to my API's.I tried putting to my routes but I am not sure how to use it.My aim is to get the response time in the console for each request.

var responseTime = require('response-time')
app.use(responseTime());
app.route('/getAllUsers').get(users.getUsers); 

Can anyone please suggest help.Thanks.

Solution 1

For getting the response time in your routes -

var start = new Date();

router.get('/dummy', function(req, res, next){
    console.log('Request took:', new Date() - start, 'ms');
});

output ex - Request took: 1596 ms

Solution 2

You can pass a function that will get called after a request:

app.use(responseTime((req, res, time) => {
  console.log(req.method, req.url, time + 'ms');
}));

Or use a more elaborate logger middleware like morgan that also provides the option to log response times.

Comments

[manelescuer]

I've never used response-time module, but I guess you should look at your headers response to see elapsed time.

[robertklep]

That shows the time between the start of the server and the time the request came in. Not very useful.

[MMR]

Hi robertklep,how can I print timeslap for every http request i see in console.

[robertklep]

I assume you mean timestamp? console.log(new Date(), req.method, req.url, time + 'ms'). But if you want that, I really recommend using a proper logging module like the aforementioned morgan.

[MMR]

I am trying to put timestamp for all requests that I see in the console.