Hi Maik, On Friday, 30 August 2013 15:04:03 UTC+5:30, Maik Schünemann wrote: > > Hi, > > > Not sure if it suits your needs, but I've been working on a simple > > S-expression evaluation library that works in Clojure and ClojureScript: > > https://github.com/kumarshantanu/quiddity > > > quiddity looks interesting. From what I read at the github page, > creating functions (which is the requirement for me) is listed as a > limitation and implemented using an evaluator. How is it done? Does > the created function incur overhead when excecuting (maybe by walking > the expression)? Or is there only one time an overhead and afterwards > runs like a normal function? >
At runtime, evaluation behaves like an interpreter looking up the expression symbols into the user-specified environment (collection of maps) to find their values, so the performance takes a hit there. The overhead is directly proportional to the depth of the expression and number of symbols used. If you can precompile the dependency functions (using code generation or macros) and use them in the environment instead of passing a large expression to evaluate, that should minimize the performance overhead. I will be happy to answer any specific questions or go into detail, please feel free to ask. The fn expression (via the evaluator) doesn't support meta-info, pre-conditions etc now but the essential functionality should work. Shantanu -- -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
