> We immediately started moving the rest of our back end to Python. Most things were slower, but not by much because most of our back end was i/o bound.

Would be kind of cool if e. g. python or ruby could be as fast as C or C++.

I wonder if this could be possible, assuming we could modify both to achieve that as outcome. But without having a language that would be like C or C++. Right now there is a strange divide between "scripting" languages and compiled ones.