The compiler was rewritten and now Chez Scheme is used as part of the pipeline from Racket to assembler. With respect to improving the startup time, the low han

The compiler was rewritten and now Chez Scheme is used as part of the pipeline from Racket to assembler. With respect to improving the startup time, the low hanging fruit has already been picked. If I understand correctly part of the problem is the number of modules that needs to be loaded from disk at startup. On my computer the first run is slower than subsequent runs due to caching. Maybe an "compile several modules into a single file" approach might improve things - but it's not trivial project.