[Fledeskum]

Most of the gain was from actual logic, if there had been only models & controllers we wouldn't have seen any major benefits. But there was a lot of IoC with the customary mountains of rather pointless interfaces, an "admin" of sorts & a "messaging" queue running tasks. Most of the POJO data classes ended up being replaced by Python's built in dictionary. Basically the mixture of Python's stdlib, the language ecosystem & Django's got rid of most of our code. In the cases where we couldn't reuse anything from anywhere, something like a business logic class would normally shrink by 2/3. And the frontend was not JS heavy so that factors in.

I hadn't started when the decision to go Django instead of Rails was made (Rails & .NET MVC were also considered) but I've been told it came down to a number of things:

* This is in Europe, generally Ruby is not used very much over here, Python has been used in some shape or form in every company I've have experience of but I've only seen Ruby recently and then mostly for Chef or Puppet.

* Lack of explicit imports did not work in Ruby's favour.

* If needed numpy & scipy don't have a analogue in the Ruby ecosystem.

* General negativity towards the religious zeal permeating through the Rails community.

[edwinnathaniel]

From what I know, JavaEE 6 IoC doesn't require interface so that may cut the code a little bit further. The thing about Java ecosystem is that they rely heavily on IoC/Interface for testing and I can't really blame them because that set-up guarantee super fast unit-tests unlike Rails ActiveRecord (in fact there's a little bit of movement recently in the Rails community that picked up from Java).

ASP.NET MVC won't have much gain over Spring MVC/JAX-RS. In fact, there's nothing similar to JAX-RS in ASP.NET MVC (you'd have to write your own stuff here and there and wire them together, not as straightforward as JAX-RS).

This is an excellent story to share both from technical perspective (Java+Frameworks => Django+Python+Pythonic mindset) and from recruiting perspective. I hope one day you could share (perhaps in slides/presentation style) the actual code and technique in details.

Mind if I ask you where in Europe? (Country/City?) For a while I thought Europe is Rails heavy.