> I want to learn enough to work on improving the GC and (soft) real-time capabilities of s7 Scheme The first thing you should look at is MPS (see https://gith

> I want to learn enough to work on improving the GC and (soft) real-time capabilities of s7 Scheme The first thing you should look at is MPS (see https://github.com/Ravenbrook/mps https://github.com/Ravenbrook/mps and https://www.ravenbrook.com/project/mps/ https://www.ravenbrook.com/project/mps/). It's open source, professionally maintained and very powerful, and it was used e.g. in Dylan and LispWorks.