Bugfix/speedup

Speedup

- [ ] test coverage
- [ ] finish the code
- [ ] gather feedback for my changes
- [ ] submit changes to the documentation

URL to Stopwatch component:

* http://symfony.com/blog/new-in-symfony-2-2-new-stopwatch-component
* http://www.symfony-grenoble.fr/en/269/add-your-own-data-to-the-profiler-timeline/
* http://symfony.com/doc/current/components/stopwatch.html

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| Tests pass?   | none
| Fixed tickets | none
| Doc           | none