Display Page Load Time in Rails 3

Question

How can I display the page load time in the view, similar to how the log file shows "Completed 200 OK in 19ms (Views: 16.8ms | Models: 0.497ms)"

I think he means displaying the time in the view when you look at it in a browser.. not from the logs — johnmcaliley, Nov 15 '10 at 20:03

score 16 · Accepted Answer · edited Oct 01 '15 at 13:35

16

You might want to use Seconds better:

class ApplicationController < ActionController::Base

  before_filter :set_start_time

  def set_start_time
    @start_time = Time.now.to_f
  end

end

View Code:

Page Rendered in <%= sprintf('%.3f', (Time.now.to_f - @start_time) ) %> seconds

edited Oct 01 '15 at 13:35

Simeon Leyzerzon

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answered Mar 11 '12 at 07:17

Fred

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This will often result in negative values, since `usec` wraps around to zero every second. – Artur Sapek Apr 17 '14 at 02:47

score 10 · Answer 2 · edited Nov 16 '10 at 14:22

10

You can do this.. add a before_filter to your application_controller:

class ApplicationController < ActionController::Base
  protect_from_forgery
  before_filter :init

  def init
    @start_time = Time.now
  end
end

in the view (I am using HAML):

load_time=#{Time.now-@start_time} seconds

This is not going to be exactly the same as the time you see in the logs, since it's only from the before_filter to the place where it was called in the view, but it should be close.

edited Nov 16 '10 at 14:22

John Topley

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answered Nov 15 '10 at 20:00

johnmcaliley

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and of course this is kinda ugly in the view, just showing this for simplicity. You would want to put that in a helper – johnmcaliley Nov 15 '10 at 20:01

score 0 · Answer 3 · answered Apr 30 '15 at 18:09

0

Just go through the below railcast video you'll get to know all your concerned details.

http://railscasts.com/episodes/368-miniprofiler?view=asciicast

answered Apr 30 '15 at 18:09

samarth

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score 0 · Answer 4 · answered Oct 18 '17 at 02:19

0

You could use rack-mini-profiler which adds a little badge to the top of the page showing all the details of the rendering speed.

answered Oct 18 '17 at 02:19

Qwertie

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Display Page Load Time in Rails 3

4 Answers4