While I fully understand your considerations, I think they are negligible<sup>**</sup> when weighted against ease of use and maintainability, which is what most developers of successful projects are after these days. Performance analysis and optimisation usually come later through profiling. Application servers are horizontally scalable, faster and cheaper every day, while a developer will always cost the same sort of money.

<sup>**</sup> <sub>The aforementioned *abomination* couldn't we farther from a real-life use case, and these "hello world" benchmarks are notorious for making PHP frameworks look lame, while a more complicated, "real life" benchmark would divide the differences by some orders of magnitude.</sub>