Use Blackfire.io or similar service to profile HTTP requests

[motin]

It would be incredibly insightful if (by special config or by default) blackfire profiles could be generated for each of the framework hello world requests.

The implementation can be as simple as configuring a stack for blackfire and then issuing a "blackfire curl" command next to the existing curl command which is executed for each framework during the benchmark.

Read more here: https://blackfire.io/docs/cookbooks/profiling-http