OP here. Peloton has been posted here before, but didn't get any attention.

I think this database is very interesting even if you don't care about the time saving part of it, since it claims to be a hybrid (OLAP and OLTP), it implements postgres' wire protocol and it claims to compile queries to machine code using LLVM [1].

[1]: https://www.youtube.com/watch?v=mzMnyYdO8jk (slideshow: http://www.cs.cmu.edu/~pavlo/slides/selfdriving-nov2016.pdf)