ruby - How to identify slowness lines in Rails app? -

I have a Rail app running at 4.1.6 and Ruby 2.1.3. Some times they take some time for such a long time, but this does not happen all the time when I check for NewCellix, even then I can not detect or trace lines at slow speed.

check Perftools - You can use googles perftools, or write a good about it

It runs through your application and the individual finds the obstacles by determining the time spent in the call. You will get the output like this:

  Total: 23 samples 18 78.3% 78.3% 18 78.3% BigDickel # div4 17.4% 95.7% 4 17.4% BigDecell # * 1 4.3% 100.0% 23 100.0 % BigMath # PI 0 0.0% 100.0% 23 100.0% BigDih.pi  

In this case, you will need to spend some time looking at div The method in the wild