Of course it might be the case that not many people are interested in the implementing ideas from CLOS for Clojure especially since there's a lot of exciting new functional ground to cover in Clojure first ;) I come from a UI background so I'm interested in the OO implications/possiblities of Clojure. In any case a couple half-thought out notes about make-instance performance characteristics: make-instance is about as fast as struct-map even tho it dynamically looks up key initializers (make sense since it's just a macro that unfolds into a struct-map).
On a new MBP 2.4ghz you can allocate 1,000,000 instances (3 fields) in ~700ms. Same for struct-map. struct is a little less than 4 times faster it seems that struct-map. One possible optimization for make-instance would be to make make-instance automatically order all keys (seems like a bit of work especially with multiple inheritance). As a comparison using a hash-map directly gives another 3-4x performance increase. As a comparison of other implementations (probably not a fair one since CLOS does way more bookkeeping than my measly hack ;): SBCL instantiates 1,000,000 instances of a class with 3 fields in ~70ms (could get closer to ~250ms in Clojure with auto-ordering of keys, if the sorting algorithm was quick enough). Clozure CL 64 does the same in ~1.5secs. Cool stuff. Clojure is zippy. --~--~---------~--~----~------------~-------~--~----~ 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 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 -~----------~----~----~----~------~----~------~--~---
