[liamkf]

I've experienced the effects of trying to have the C++ "kernel" and a HLL for the "rest" on a project.

We allowed large parts AI/gameplay (not generally what I would think of as "kernel") to be pushed out of C++ into a HLL, and it was extremely painful bringing it back when the performance began to hurt us.

[groby_b]

You can't by any chance share a bit more about the project, can you?

I'd certainly be interested to hear about this, because I'd love to know what the breaking points were.