And here’s a numeric analysis: [samth@huor:~/sw/pycket (master) plt] sort < pycket-inst2 \| uniq -c \| sort -n 1 instantiating linklet : /home/samth/sw/pycket/pypy/../expander.rktl.linklet 1 instantiating linklet : /home/samth/sw/pycket/pypy/../fasl.rktl.linklet 41 instantiating linklet : syntax-literals 48 instantiating linklet : syntax-literals-data 55 instantiating linklet : module 78 instantiating linklet : data 78 instantiating linklet : decl [samth@huor:~/sw/pycket (master) plt] sort < rcs-inst3 \| uniq -c \| sort -n 41 instantiating linklet : syntax-literals 48 instantiating linklet : syntax-literals-data 57 instantiating linklet : module 68 instantiating linklet : data 68 instantiating linklet : decl It looks like pycket has two fewer “module” instantiations, which is probably because we’re not calling configure-runtime, and 10 more each of data and decl, which I don’t understand.

Here’s a diff of the two : https://gist.github.com/cderici/5c28558c1e387cc323bd6ed89c0af692