1 app-office/lyx:monolithic - build with --monolithic, potentially speeding up compiles at the cost of heavy memory use.
2 dev-lang/gnu-smalltalk:jit - enable the experimental JIT compiler.
3 dev-lang/gnu-smalltalk:preempt - enable experimental pre-emptive concurrency.
4 dev-lisp/clisp:hyperspec - use dev-lisp/hyperspec for documentation instead of remote copy.