this is mostly orthogonal to issue I have. Syntax-wise I want either Common Lisp or IsLisp style special variables, with selection of syntax being predicated on

this is mostly orthogonal to issue I have. Syntax-wise I want either Common Lisp or IsLisp style special variables, with selection of syntax being predicated on other concerns like performance, interaction with multiple threads (dfsch was originally fully multithreaded, current implementation uses global interpreter lock only for few rare operations, which is faster than fine-grained locking) and isolation between multiple lexical environments (so dynamic variables have to be partially lexicaly scoped)