Not terrible, depending on what you are doing: it compiles down to the obvious b...

Not terrible, depending on what you are doing: it compiles down to the obvious bytecode for most statements/expressions.

If you start using the open type system, you end up going through some somewhat slow reflective code to make everything work, and that can be slower.

The biggest problems with Gosu right now are:

- Startup time - Tools support

We are working on both of those and hope to have better tools out over the summer.