stopwatch

Stopwatch

Show the time that was necessary to render your page and the amount of queries that were executed.

Installation

Just add the following to your development group and you are good to go:

gem 'stopwatch'

Every page will now display the duration in the upper right corner and the amount of (non-cached) queries.

Inspiration

I was inspired by an article on the Coding Horror blog where they talk about how adding a small box that displays page speed motivated them to not forget about the performance of their pages.

Some excerpts:

The simple act of putting a render time in the upper right hand corner of every page we serve forced us to fix all our performance regressions and omissions.

In fact, with the render time appearing on every page for everyone on the dev team, performance became a point of pride. We had so many places where we had just gotten a little sloppy or missed some tiny thing that slowed a page down inordinately.

I could especially identify with the last one and I wanted to quickly get this gem out there to see if I could recreate that same effect.

Caveats

• It removes etags so we can display it fresh every page load, otherwise the response would get cached by the browser because Rails would return a 304 Not Modified and you wouldn't see any changes on page refresh.

Todo

• Basic configuration

Thanks

Paul Engel For the name!

License

Copyright (C) 2011 by Mark Mulder

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.