This gem uses Google Analytics User Timing API to report application performance statistics directly to Google Analytics, where you can slice & dice your data as you wish.
Here are some features with pictures:
- Performance reports as a nice dashboard
- Histogram of response times for action
- Identify slow page loads & drill down to different actions
- Showing average response times for each action
- How much is spent in database & view generation for an action?
- How has the switch to Ruby 1.9.3 affected response time?
- In which action do we spent most time globaly?
- NEW (in 0.1.0) ActiveRecord queries drilldown
- NEW (in 0.2.0) Deployment performance comparison
Or look at these slides from a Garelic presentation.
It's easy as 1-2-3.
Step 1. Add this line to your application's Gemfile:
Step 2. Add
<%= Garelic.monitoring 'UA-XXXXXX-X' %> instrumentation in application layout template (before the closing
</head> tag) like this:
<head> <!-- other rails stuff --> <%= Garelic.monitoring 'UA-XXXXXX-X' %> <!-- make sure you remove your old GA code! --> </head>
Step 3. Go to Google Analytics > Content > Site Speed > User Timings
- it's free
- shows slow performing pages (not only actions)
- show response times histogram for any action (response time averages tend to lie, since distribution of response times is multimodal)
- segment/slice/dice response data across any dimensions available in your GA account
- you can only track actions that return a response body (redirects, ajax-requests & async jobs are not supported)
- all timings are visible in page source code (if you are concerned about this look elsewere)
- caching GA code (e.g. page caching) & not modified response will probably break/skew reported statistics
- adding user timing table widgets to GA dashboards does not preserve sorting order (wtf?)
- it's kind of a hack
- add support for adding custom user tracers (e.g. for external services)
- Fork it
- Create your feature branch (
git checkout -b my-new-feature)
- Commit your changes (
git commit -am 'Added some feature')
- Push to the branch (
git push origin my-new-feature)
- Create new Pull Request